diff --git a/examples/imports_function_env.rs b/examples/imports_function_env.rs
index 88caf3c6e..7aa4dc559 100644
--- a/examples/imports_function_env.rs
+++ b/examples/imports_function_env.rs
@@ -74,10 +74,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     }
 
     // Create the functions
-    fn get_counter(env: &mut Env) -> i32 {
+    fn get_counter(env: &Env) -> i32 {
         *env.counter.borrow()
     }
-    fn add_to_counter(env: &mut Env, add: i32) -> i32 {
+    fn add_to_counter(env: &Env, add: i32) -> i32 {
         let mut counter_ref = env.counter.borrow_mut();
 
         *counter_ref += add;
diff --git a/lib/api/Cargo.toml b/lib/api/Cargo.toml
index 2b364806e..c026d6a10 100644
--- a/lib/api/Cargo.toml
+++ b/lib/api/Cargo.toml
@@ -67,6 +67,8 @@ llvm = [
     "wasmer-compiler-llvm",
     "compiler",
 ]
+# enables internal features used by the deprecated API.
+deprecated = []
 default-compiler = []
 default-engine = []
 
diff --git a/lib/api/src/externals/function.rs b/lib/api/src/externals/function.rs
index 76835b22a..226bb80a5 100644
--- a/lib/api/src/externals/function.rs
+++ b/lib/api/src/externals/function.rs
@@ -6,6 +6,9 @@ use crate::FunctionType;
 use crate::NativeFunc;
 use crate::RuntimeError;
 pub use inner::{FromToNativeWasmType, HostFunction, WasmTypeList, WithEnv, WithoutEnv};
+#[cfg(feature = "deprecated")]
+pub use inner::{LegacyEnv, WithLegacyEnv};
+
 use std::cmp::max;
 use std::fmt;
 use wasmer_vm::{
@@ -253,6 +256,47 @@ impl Function {
         }
     }
 
+    /// Function used by the deprecated API to call a function with a `&mut` Env.
+    ///
+    /// This is  not a stable API and may be broken at any time.
+    ///
+    /// # Safety
+    /// - This function is only safe to use from the deprecated API.
+    #[doc(hidden)]
+    #[cfg(feature = "deprecated")]
+    pub unsafe fn new_native_with_env_legacy<F, Args, Rets, Env>(
+        store: &Store,
+        env: Env,
+        func: F,
+    ) -> Self
+    where
+        F: HostFunction<Args, Rets, WithLegacyEnv, Env>,
+        Args: WasmTypeList,
+        Rets: WasmTypeList,
+        Env: LegacyEnv + 'static,
+    {
+        let function = inner::Function::<Args, Rets>::new(func);
+        let address = function.address();
+
+        let box_env = Box::new(env);
+        let vmctx = VMFunctionEnvironment {
+            host_env: Box::into_raw(box_env) as *mut _,
+        };
+        let signature = function.ty();
+
+        Self {
+            store: store.clone(),
+            definition: FunctionDefinition::Host(HostFunctionDefinition { has_env: true }),
+            exported: ExportFunction {
+                address,
+                kind: VMFunctionKind::Static,
+                vmctx,
+                signature,
+                call_trampoline: None,
+            },
+        }
+    }
+
     /// Returns the [`FunctionType`] of the `Function`.
     ///
     /// # Example
@@ -976,6 +1020,14 @@ mod inner {
         fn function_body_ptr(self) -> *const VMFunctionBody;
     }
 
+    /// Marker trait to limit what the hidden APIs needed for the deprecated API
+    /// can be used on.
+    ///
+    /// Marks an environment as being passed by `&mut`.
+    #[cfg(feature = "deprecated")]
+    #[doc(hidden)]
+    pub unsafe trait LegacyEnv: Sized {}
+
     /// Empty trait to specify the kind of `HostFunction`: With or
     /// without an environment.
     ///
@@ -991,6 +1043,18 @@ mod inner {
 
     impl HostFunctionKind for WithEnv {}
 
+    /// An empty struct to help Rust typing to determine
+    /// when a `HostFunction` does have an environment.
+    ///
+    /// This environment is passed by `&mut` and exists soley for the deprecated
+    /// API.
+    #[cfg(feature = "deprecated")]
+    #[doc(hidden)]
+    pub struct WithLegacyEnv;
+
+    #[cfg(feature = "deprecated")]
+    impl HostFunctionKind for WithLegacyEnv {}
+
     /// An empty struct to help Rust typing to determine
     /// when a `HostFunction` does not have an environment.
     pub struct WithoutEnv;
@@ -1216,6 +1280,51 @@ mod inner {
                 }
             }
 
+            // Implement `HostFunction` for a function that has the same arity than the tuple.
+            // This specific function has an environment.
+            #[doc(hidden)]
+            #[cfg(feature = "deprecated")]
+            #[allow(unused_parens)]
+            impl< $( $x, )* Rets, RetsAsResult, Env, Func >
+                HostFunction<( $( $x ),* ), Rets, WithLegacyEnv, Env>
+            for
+                Func
+            where
+                $( $x: FromToNativeWasmType, )*
+                Rets: WasmTypeList,
+                RetsAsResult: IntoResult<Rets>,
+                Env: LegacyEnv,
+                Func: Fn(&mut Env, $( $x , )*) -> RetsAsResult + Send + 'static,
+            {
+                #[allow(non_snake_case)]
+                fn function_body_ptr(self) -> *const VMFunctionBody {
+                    /// This is a function that wraps the real host
+                    /// function. Its address will be used inside the
+                    /// runtime.
+                    extern fn func_wrapper<$( $x, )* Rets, RetsAsResult, Env, Func>( env: &mut Env, $( $x: $x::Native, )* ) -> Rets::CStruct
+                    where
+                        $( $x: FromToNativeWasmType, )*
+                        Rets: WasmTypeList,
+                        RetsAsResult: IntoResult<Rets>,
+                        Env: Sized,
+                        Func: Fn(&mut Env, $( $x ),* ) -> RetsAsResult + 'static
+                    {
+                        let func: &Func = unsafe { &*(&() as *const () as *const Func) };
+
+                        let result = panic::catch_unwind(AssertUnwindSafe(|| {
+                            func(env, $( FromToNativeWasmType::from_native($x) ),* ).into_result()
+                        }));
+
+                        match result {
+                            Ok(Ok(result)) => return result.into_c_struct(),
+                            Ok(Err(trap)) => unsafe { raise_user_trap(Box::new(trap)) },
+                            Err(panic) => unsafe { resume_panic(panic) },
+                        }
+                    }
+
+                    func_wrapper::< $( $x, )* Rets, RetsAsResult, Env, Self > as *const VMFunctionBody
+                }
+            }
         };
     }
 
diff --git a/lib/api/src/externals/mod.rs b/lib/api/src/externals/mod.rs
index 370a3173d..4466f1dda 100644
--- a/lib/api/src/externals/mod.rs
+++ b/lib/api/src/externals/mod.rs
@@ -6,6 +6,9 @@ mod table;
 pub use self::function::{
     FromToNativeWasmType, Function, HostFunction, WasmTypeList, WithEnv, WithoutEnv,
 };
+
+#[cfg(feature = "deprecated")]
+pub use self::function::{LegacyEnv, WithLegacyEnv};
 pub use self::global::Global;
 pub use self::memory::Memory;
 pub use self::table::Table;
diff --git a/lib/api/src/lib.rs b/lib/api/src/lib.rs
index 1be14f354..247deb7eb 100644
--- a/lib/api/src/lib.rs
+++ b/lib/api/src/lib.rs
@@ -46,6 +46,8 @@ pub mod internals {
     //! `wasmer-vm`. Please don't use any of this types directly, as
     //! they might change frequently or be removed in the future.
 
+    #[cfg(feature = "deprecated")]
+    pub use crate::externals::{LegacyEnv, WithLegacyEnv};
     pub use crate::externals::{WithEnv, WithoutEnv};
 }
 
diff --git a/lib/deprecated/runtime-core/Cargo.lock b/lib/deprecated/runtime-core/Cargo.lock
index 8b2331c57..d971b374e 100644
--- a/lib/deprecated/runtime-core/Cargo.lock
+++ b/lib/deprecated/runtime-core/Cargo.lock
@@ -120,6 +120,12 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "const_fn"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c478836e029dcef17fb47c89023448c64f781a046e0300e257ad8225ae59afab"
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.5"
@@ -128,18 +134,18 @@ checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
 [[package]]
 name = "cranelift-bforest"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9413a2c6bdb01ab8acc867421bd7343ddea491d015453f4e56f4f60c816d120"
+checksum = "0f065f6889758f817f61a230220d1811ba99a9762af2fb69ae23048314f75ff2"
 dependencies = [
  "cranelift-entity",
 ]
 
 [[package]]
 name = "cranelift-codegen"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f28d389588c2375bb95292e0bc6cbf010e7f30fb4e9734738b576521b737826a"
+checksum = "510aa2ab4307644100682b94e449940a0ea15c5887f1d4b9678b8dd5ef31e736"
 dependencies = [
  "byteorder",
  "cranelift-bforest",
@@ -149,7 +155,6 @@ dependencies = [
  "gimli 0.21.0",
  "log",
  "regalloc",
- "serde",
  "smallvec",
  "target-lexicon",
  "thiserror",
@@ -157,9 +162,9 @@ dependencies = [
 
 [[package]]
 name = "cranelift-codegen-meta"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74dd3cf6f107c1df4c2b8aab91ec4181aee7ff17289673fcbec63325e7e40a83"
+checksum = "b4cb0c7e87c60d63b35f9670c15479ee4a5e557dd127efab88b2f9b2ca83c9a0"
 dependencies = [
  "cranelift-codegen-shared",
  "cranelift-entity",
@@ -167,24 +172,24 @@ dependencies = [
 
 [[package]]
 name = "cranelift-codegen-shared"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "efaf050fab2dbf324544489443ff3cc8c67c9420c8902ec6628bd906bd7393e9"
+checksum = "60636227098693e06de8d6d88beea2a7d32ecf8a8030dacdb57c68e06f381826"
 
 [[package]]
 name = "cranelift-entity"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f07eb8aa0a5da94b56339e4e3052c496a3df4354357cd5da8c7b02c6e8f1dc1d"
+checksum = "6156db73e0c9f65f80c512988d63ec736be0dee3dd66bf951e3e28aed9dc02d3"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "cranelift-frontend"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f6fe1d3e968576f4b60d23f40ee90281f8de2cdf23d2110f3b0296ff420555e"
+checksum = "e09cd158c9a820a4cc14a34076811da225cce1d31dc6d03c5ef85b91aef560b9"
 dependencies = [
  "cranelift-codegen",
  "log",
@@ -202,50 +207,49 @@ dependencies = [
 ]
 
 [[package]]
-name = "crossbeam-deque"
-version = "0.7.3"
+name = "crossbeam-channel"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f02af974daeee82218205558e51ec8768b48cf524bd01d550abe5573a608285"
+checksum = "dca26ee1f8d361640700bde38b2c37d8c22b3ce2d360e1fc1c74ea4b0aa7d775"
 dependencies = [
+ "cfg-if 1.0.0",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94af6efb46fef72616855b036a624cf27ba656ffc9be1b9a3c931cfc7749a9a9"
+dependencies = [
+ "cfg-if 1.0.0",
  "crossbeam-epoch",
  "crossbeam-utils",
- "maybe-uninit",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.8.2"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
+checksum = "ec0f606a85340376eef0d6d8fec399e6d4a544d648386c6645eb6d0653b27d9f"
 dependencies = [
- "autocfg",
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
+ "const_fn",
  "crossbeam-utils",
  "lazy_static",
- "maybe-uninit",
  "memoffset",
  "scopeguard",
 ]
 
-[[package]]
-name = "crossbeam-queue"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "774ba60a54c213d409d5353bda12d49cd68d14e45036a285234c8d6f91f92570"
-dependencies = [
- "cfg-if 0.1.10",
- "crossbeam-utils",
- "maybe-uninit",
-]
-
 [[package]]
 name = "crossbeam-utils"
-version = "0.7.2"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
+checksum = "ec91540d98355f690a86367e566ecad2e9e579f230230eb7c21398372be73ea5"
 dependencies = [
  "autocfg",
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
+ "const_fn",
  "lazy_static",
 ]
 
@@ -570,12 +574,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "maybe-uninit"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
-
 [[package]]
 name = "memchr"
 version = "2.3.3"
@@ -637,20 +635,20 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.19.0"
+version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cbca9424c482ee628fa549d9c812e2cd22f1180b9222c9200fdfa6eb31aecb2"
+checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
+
+[[package]]
+name = "object"
+version = "0.21.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37fd5004feb2ce328a52b0b3d01dbf4ffff72583493900ed15f22d4111c51693"
 dependencies = [
  "crc32fast",
  "indexmap",
 ]
 
-[[package]]
-name = "object"
-version = "0.20.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
-
 [[package]]
 name = "once_cell"
 version = "1.4.0"
@@ -793,9 +791,9 @@ dependencies = [
 
 [[package]]
 name = "rayon"
-version = "1.3.1"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62f02856753d04e03e26929f820d0a0a337ebe71f849801eea335d464b349080"
+checksum = "8b0d8e0819fadc20c74ea8373106ead0600e3a67ef1fe8da56e39b9ae7275674"
 dependencies = [
  "autocfg",
  "crossbeam-deque",
@@ -805,12 +803,12 @@ dependencies = [
 
 [[package]]
 name = "rayon-core"
-version = "1.7.1"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e92e15d89083484e11353891f1af602cc661426deb9564c298b270c726973280"
+checksum = "9ab346ac5921dc62ffa9f89b7a773907511cdfa5490c572ae9be1be33e8afa4a"
 dependencies = [
+ "crossbeam-channel",
  "crossbeam-deque",
- "crossbeam-queue",
  "crossbeam-utils",
  "lazy_static",
  "num_cpus",
@@ -824,9 +822,9 @@ checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
 [[package]]
 name = "regalloc"
-version = "0.0.26"
+version = "0.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c03092d79e0fd610932d89ed53895a38c0dd3bcd317a0046e69940de32f1d95"
+checksum = "2041c2d34f6ff346d6f428974f03d8bf12679b0c816bb640dc5eb1d48848d8d1"
 dependencies = [
  "log",
  "rustc-hash",
@@ -1011,9 +1009,9 @@ dependencies = [
 
 [[package]]
 name = "target-lexicon"
-version = "0.10.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab0e7238dcc7b40a7be719a25365910f6807bd864f4cce6b2e6b873658e2b19d"
+checksum = "4ee5a98e506fb7231a304c3a1bd7c132a55016cf65001e0282480665870dfcb9"
 
 [[package]]
 name = "tempfile"
@@ -1115,7 +1113,7 @@ checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
 [[package]]
 name = "wasmer"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "cfg-if 0.1.10",
  "indexmap",
@@ -1137,7 +1135,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-cache"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "blake3",
  "hex",
@@ -1148,7 +1146,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "enumset",
  "raw-cpuid",
@@ -1164,7 +1162,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler-cranelift"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "cranelift-codegen",
  "cranelift-frontend",
@@ -1172,6 +1170,7 @@ dependencies = [
  "more-asserts",
  "rayon",
  "serde",
+ "smallvec",
  "tracing",
  "wasmer-compiler",
  "wasmer-types",
@@ -1180,7 +1179,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler-llvm"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "byteorder",
  "cc",
@@ -1202,7 +1201,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler-singlepass"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "byteorder",
  "dynasm",
@@ -1219,7 +1218,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-engine"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "backtrace",
  "bincode",
@@ -1237,7 +1236,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-engine-jit"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "bincode",
  "cfg-if 0.1.10",
@@ -1253,7 +1252,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-engine-native"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "bincode",
  "cfg-if 0.1.10",
@@ -1272,9 +1271,9 @@ dependencies = [
 
 [[package]]
 name = "wasmer-object"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
- "object 0.19.0",
+ "object 0.21.1",
  "thiserror",
  "wasmer-compiler",
  "wasmer-types",
@@ -1300,7 +1299,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-types"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "cranelift-entity",
  "serde",
@@ -1308,7 +1307,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-vm"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "backtrace",
  "cc",
@@ -1326,9 +1325,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.57.0"
+version = "0.65.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32fddd575d477c6e9702484139cf9f23dcd554b06d185ed0f56c857dd3a47aa6"
+checksum = "87cc2fe6350834b4e528ba0901e7aa405d78b89dc1fa3145359eb4de0e323fcf"
 
 [[package]]
 name = "wast"
diff --git a/lib/deprecated/runtime-core/Cargo.toml b/lib/deprecated/runtime-core/Cargo.toml
index 12d26452c..432676017 100644
--- a/lib/deprecated/runtime-core/Cargo.toml
+++ b/lib/deprecated/runtime-core/Cargo.toml
@@ -15,7 +15,7 @@ maintenance = { status = "deprecated" }
 
 [dependencies]
 wasmer-types = { path = "../../wasmer-types", version = "1.0.0-alpha5" }
-wasmer = { path = "../../api", version = "1.0.0-alpha5" }
+wasmer = { path = "../../api", version = "1.0.0-alpha5", features = ["deprecated"] }
 wasmer-cache = { path = "../../cache", version = "1.0.0-alpha5" }
 wasmer-compiler = { path = "../../compiler", version = "1.0.0-alpha5", features = ["translator"] }
 wasmer-compiler-llvm = { path = "../../compiler-llvm", version = "1.0.0-alpha5", optional = true }
diff --git a/lib/deprecated/runtime-core/src/typed_func.rs b/lib/deprecated/runtime-core/src/typed_func.rs
index a1b8d7468..8596bc2b3 100644
--- a/lib/deprecated/runtime-core/src/typed_func.rs
+++ b/lib/deprecated/runtime-core/src/typed_func.rs
@@ -6,6 +6,7 @@ use crate::{
 };
 use std::marker::PhantomData;
 
+pub use new::wasmer::internals::LegacyEnv;
 pub use new::wasmer::{HostFunction, WasmTypeList};
 
 /// Represents a function that can be used by WebAssembly.
@@ -27,17 +28,19 @@ where
     /// Creates a new `Func`.
     pub fn new<F>(func: F) -> Self
     where
-        F: HostFunction<Args, Rets, new::wasmer::internals::WithEnv, vm::Ctx>,
+        F: HostFunction<Args, Rets, new::wasmer::internals::WithLegacyEnv, vm::Ctx> + Send,
     {
         // Create an empty `vm::Ctx`, that is going to be overwritten by `Instance::new`.
         let ctx = unsafe { vm::Ctx::new_uninit() };
 
         Self {
-            new_function: new::wasmer::Function::new_native_with_env::<F, Args, Rets, vm::Ctx>(
-                &get_global_store(),
-                ctx,
-                func,
-            ),
+            new_function: unsafe {
+                new::wasmer::Function::new_native_with_env_legacy::<F, Args, Rets, vm::Ctx>(
+                    &get_global_store(),
+                    ctx,
+                    func,
+                )
+            },
             _phantom: PhantomData,
         }
     }
@@ -234,35 +237,36 @@ use std::{
 /// `module::Module::instantiate`.
 pub(crate) struct DynamicCtx {
     pub(crate) vmctx: Rc<RefCell<vm::Ctx>>,
+    inner_func:
+        Box<dyn Fn(&mut vm::Ctx, &[Value]) -> Result<Vec<Value>, RuntimeError> + Send + 'static>,
 }
 
 impl DynamicFunc {
     /// Create a new `DynamicFunc`.
     pub fn new<F>(signature: &FuncSig, func: F) -> Self
     where
-        F: Fn(&mut vm::Ctx, &[Value]) -> Result<Vec<Value>, RuntimeError> + 'static,
+        F: Fn(&mut vm::Ctx, &[Value]) -> Result<Vec<Value>, RuntimeError> + Send + 'static,
     {
         // Create an empty `vm::Ctx`, that is going to be overwritten by `Instance::new`.
         let ctx = DynamicCtx {
             vmctx: Rc::new(RefCell::new(unsafe { vm::Ctx::new_uninit() })),
+            inner_func: Box::new(func),
         };
 
-        Self {
-            new_function: new::wasmer::Function::new_with_env(
-                &get_global_store(),
-                signature,
-                ctx,
-                // Wrapper to safely extract a `&mut vm::Ctx` to pass
-                // to `func`.
-                move |dyn_ctx: &mut DynamicCtx,
-                      params: &[Value]|
-                      -> Result<Vec<Value>, RuntimeError> {
-                    let cell: Rc<RefCell<vm::Ctx>> = dyn_ctx.vmctx.clone();
-                    let mut vmctx: RefMut<vm::Ctx> = cell.borrow_mut();
+        // Wrapper to safely extract a `&mut vm::Ctx` to pass
+        // to `func`.
+        fn inner(dyn_ctx: &DynamicCtx, params: &[Value]) -> Result<Vec<Value>, RuntimeError> {
+            let cell: Rc<RefCell<vm::Ctx>> = dyn_ctx.vmctx.clone();
+            let mut vmctx: RefMut<vm::Ctx> = cell.borrow_mut();
 
-                    func(vmctx.deref_mut(), params)
-                },
-            ),
+            (dyn_ctx.inner_func)(vmctx.deref_mut(), params)
+        }
+
+        Self {
+            new_function: new::wasmer::Function::new_with_env::<
+                fn(&DynamicCtx, &[Value]) -> Result<Vec<Value>, RuntimeError>,
+                DynamicCtx,
+            >(&get_global_store(), signature, ctx, inner),
         }
     }
 
diff --git a/lib/deprecated/runtime-core/src/vm.rs b/lib/deprecated/runtime-core/src/vm.rs
index 8b129e3c6..829a5f617 100644
--- a/lib/deprecated/runtime-core/src/vm.rs
+++ b/lib/deprecated/runtime-core/src/vm.rs
@@ -1,6 +1,8 @@
-use crate::module::ModuleInfo;
+use crate::{module::ModuleInfo, new};
 use std::{ffi::c_void, ptr};
 
+use new::wasmer::internals::LegacyEnv;
+
 /// The context of the currently running WebAssembly instance.
 ///
 /// This is implicitly passed to every WebAssembly function.
@@ -38,6 +40,9 @@ pub struct Ctx {
     pub data_finalizer: Option<fn(data: *mut c_void)>,
 }
 
+/// We mark `Ctx` as a legacy env that can be passed by `&mut`.
+unsafe impl LegacyEnv for Ctx {}
+
 impl Ctx {
     pub(crate) unsafe fn new_uninit() -> Self {
         Self {
diff --git a/lib/deprecated/runtime/Cargo.lock b/lib/deprecated/runtime/Cargo.lock
index e4cfe7113..a3584c588 100644
--- a/lib/deprecated/runtime/Cargo.lock
+++ b/lib/deprecated/runtime/Cargo.lock
@@ -120,6 +120,12 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "const_fn"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c478836e029dcef17fb47c89023448c64f781a046e0300e257ad8225ae59afab"
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.5"
@@ -128,18 +134,18 @@ checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
 [[package]]
 name = "cranelift-bforest"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9413a2c6bdb01ab8acc867421bd7343ddea491d015453f4e56f4f60c816d120"
+checksum = "0f065f6889758f817f61a230220d1811ba99a9762af2fb69ae23048314f75ff2"
 dependencies = [
  "cranelift-entity",
 ]
 
 [[package]]
 name = "cranelift-codegen"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f28d389588c2375bb95292e0bc6cbf010e7f30fb4e9734738b576521b737826a"
+checksum = "510aa2ab4307644100682b94e449940a0ea15c5887f1d4b9678b8dd5ef31e736"
 dependencies = [
  "byteorder",
  "cranelift-bforest",
@@ -149,7 +155,6 @@ dependencies = [
  "gimli 0.21.0",
  "log",
  "regalloc",
- "serde",
  "smallvec",
  "target-lexicon",
  "thiserror",
@@ -157,9 +162,9 @@ dependencies = [
 
 [[package]]
 name = "cranelift-codegen-meta"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74dd3cf6f107c1df4c2b8aab91ec4181aee7ff17289673fcbec63325e7e40a83"
+checksum = "b4cb0c7e87c60d63b35f9670c15479ee4a5e557dd127efab88b2f9b2ca83c9a0"
 dependencies = [
  "cranelift-codegen-shared",
  "cranelift-entity",
@@ -167,24 +172,24 @@ dependencies = [
 
 [[package]]
 name = "cranelift-codegen-shared"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "efaf050fab2dbf324544489443ff3cc8c67c9420c8902ec6628bd906bd7393e9"
+checksum = "60636227098693e06de8d6d88beea2a7d32ecf8a8030dacdb57c68e06f381826"
 
 [[package]]
 name = "cranelift-entity"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f07eb8aa0a5da94b56339e4e3052c496a3df4354357cd5da8c7b02c6e8f1dc1d"
+checksum = "6156db73e0c9f65f80c512988d63ec736be0dee3dd66bf951e3e28aed9dc02d3"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "cranelift-frontend"
-version = "0.65.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f6fe1d3e968576f4b60d23f40ee90281f8de2cdf23d2110f3b0296ff420555e"
+checksum = "e09cd158c9a820a4cc14a34076811da225cce1d31dc6d03c5ef85b91aef560b9"
 dependencies = [
  "cranelift-codegen",
  "log",
@@ -202,50 +207,49 @@ dependencies = [
 ]
 
 [[package]]
-name = "crossbeam-deque"
-version = "0.7.3"
+name = "crossbeam-channel"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f02af974daeee82218205558e51ec8768b48cf524bd01d550abe5573a608285"
+checksum = "dca26ee1f8d361640700bde38b2c37d8c22b3ce2d360e1fc1c74ea4b0aa7d775"
 dependencies = [
+ "cfg-if 1.0.0",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94af6efb46fef72616855b036a624cf27ba656ffc9be1b9a3c931cfc7749a9a9"
+dependencies = [
+ "cfg-if 1.0.0",
  "crossbeam-epoch",
  "crossbeam-utils",
- "maybe-uninit",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.8.2"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
+checksum = "ec0f606a85340376eef0d6d8fec399e6d4a544d648386c6645eb6d0653b27d9f"
 dependencies = [
- "autocfg",
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
+ "const_fn",
  "crossbeam-utils",
  "lazy_static",
- "maybe-uninit",
  "memoffset",
  "scopeguard",
 ]
 
-[[package]]
-name = "crossbeam-queue"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "774ba60a54c213d409d5353bda12d49cd68d14e45036a285234c8d6f91f92570"
-dependencies = [
- "cfg-if 0.1.10",
- "crossbeam-utils",
- "maybe-uninit",
-]
-
 [[package]]
 name = "crossbeam-utils"
-version = "0.7.2"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
+checksum = "ec91540d98355f690a86367e566ecad2e9e579f230230eb7c21398372be73ea5"
 dependencies = [
  "autocfg",
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
+ "const_fn",
  "lazy_static",
 ]
 
@@ -570,12 +574,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "maybe-uninit"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
-
 [[package]]
 name = "memchr"
 version = "2.3.3"
@@ -637,20 +635,20 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.19.0"
+version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cbca9424c482ee628fa549d9c812e2cd22f1180b9222c9200fdfa6eb31aecb2"
+checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
+
+[[package]]
+name = "object"
+version = "0.21.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37fd5004feb2ce328a52b0b3d01dbf4ffff72583493900ed15f22d4111c51693"
 dependencies = [
  "crc32fast",
  "indexmap",
 ]
 
-[[package]]
-name = "object"
-version = "0.20.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
-
 [[package]]
 name = "once_cell"
 version = "1.4.0"
@@ -793,9 +791,9 @@ dependencies = [
 
 [[package]]
 name = "rayon"
-version = "1.3.1"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62f02856753d04e03e26929f820d0a0a337ebe71f849801eea335d464b349080"
+checksum = "8b0d8e0819fadc20c74ea8373106ead0600e3a67ef1fe8da56e39b9ae7275674"
 dependencies = [
  "autocfg",
  "crossbeam-deque",
@@ -805,12 +803,12 @@ dependencies = [
 
 [[package]]
 name = "rayon-core"
-version = "1.7.1"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e92e15d89083484e11353891f1af602cc661426deb9564c298b270c726973280"
+checksum = "9ab346ac5921dc62ffa9f89b7a773907511cdfa5490c572ae9be1be33e8afa4a"
 dependencies = [
+ "crossbeam-channel",
  "crossbeam-deque",
- "crossbeam-queue",
  "crossbeam-utils",
  "lazy_static",
  "num_cpus",
@@ -824,9 +822,9 @@ checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
 [[package]]
 name = "regalloc"
-version = "0.0.26"
+version = "0.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c03092d79e0fd610932d89ed53895a38c0dd3bcd317a0046e69940de32f1d95"
+checksum = "2041c2d34f6ff346d6f428974f03d8bf12679b0c816bb640dc5eb1d48848d8d1"
 dependencies = [
  "log",
  "rustc-hash",
@@ -1011,9 +1009,9 @@ dependencies = [
 
 [[package]]
 name = "target-lexicon"
-version = "0.10.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab0e7238dcc7b40a7be719a25365910f6807bd864f4cce6b2e6b873658e2b19d"
+checksum = "4ee5a98e506fb7231a304c3a1bd7c132a55016cf65001e0282480665870dfcb9"
 
 [[package]]
 name = "tempfile"
@@ -1115,7 +1113,7 @@ checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
 [[package]]
 name = "wasmer"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "cfg-if 0.1.10",
  "indexmap",
@@ -1137,7 +1135,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-cache"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "blake3",
  "hex",
@@ -1148,7 +1146,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "enumset",
  "raw-cpuid",
@@ -1164,7 +1162,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler-cranelift"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "cranelift-codegen",
  "cranelift-frontend",
@@ -1172,6 +1170,7 @@ dependencies = [
  "more-asserts",
  "rayon",
  "serde",
+ "smallvec",
  "tracing",
  "wasmer-compiler",
  "wasmer-types",
@@ -1180,7 +1179,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler-llvm"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "byteorder",
  "cc",
@@ -1202,7 +1201,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler-singlepass"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "byteorder",
  "dynasm",
@@ -1219,7 +1218,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-engine"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "backtrace",
  "bincode",
@@ -1237,7 +1236,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-engine-jit"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "bincode",
  "cfg-if 0.1.10",
@@ -1253,7 +1252,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-engine-native"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "bincode",
  "cfg-if 0.1.10",
@@ -1272,9 +1271,9 @@ dependencies = [
 
 [[package]]
 name = "wasmer-object"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
- "object 0.19.0",
+ "object 0.21.1",
  "thiserror",
  "wasmer-compiler",
  "wasmer-types",
@@ -1307,7 +1306,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-types"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "cranelift-entity",
  "serde",
@@ -1315,7 +1314,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-vm"
-version = "1.0.0-alpha4"
+version = "1.0.0-alpha5"
 dependencies = [
  "backtrace",
  "cc",
@@ -1333,9 +1332,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.57.0"
+version = "0.65.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32fddd575d477c6e9702484139cf9f23dcd554b06d185ed0f56c857dd3a47aa6"
+checksum = "87cc2fe6350834b4e528ba0901e7aa405d78b89dc1fa3145359eb4de0e323fcf"
 
 [[package]]
 name = "wast"
diff --git a/lib/vm/src/instance.rs b/lib/vm/src/instance.rs
index 456125dbd..59de46391 100644
--- a/lib/vm/src/instance.rs
+++ b/lib/vm/src/instance.rs
@@ -278,8 +278,8 @@ impl Instance {
     }
 
     /// Return a raw pointer to the vmctx used by compiled wasm code.
-    pub fn vmctx_ptr(&self) -> *const VMContext {
-        self.vmctx() as *const VMContext
+    pub fn vmctx_ptr(&self) -> *mut VMContext {
+        self.vmctx() as *const VMContext as *mut VMContext
     }
 
     /// Lookup an export with the given name.
@@ -1021,7 +1021,7 @@ impl InstanceHandle {
     }
 
     /// Return a raw pointer to the vmctx used by compiled wasm code.
-    pub fn vmctx_ptr(&self) -> *const VMContext {
+    pub fn vmctx_ptr(&self) -> *mut VMContext {
         self.instance().vmctx_ptr()
     }