diff --git a/Cargo.toml b/Cargo.toml
index 8093bd6..d837693 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ serde = { version = "^1.0.55", optional = true }
 serde_derive = { version = "^1.0.55", optional = true }
 
 [build-dependencies]
-protoc-rust = { version = "1.7.1", optional = true }
+protoc-rust = { version = "^2.0.2", optional = true }
 
 [dev-dependencies]
 serde_json = "1.0.17"
diff --git a/build.rs b/build.rs
index 85a2548..8bab568 100644
--- a/build.rs
+++ b/build.rs
@@ -26,6 +26,7 @@ fn build_protobuf(out_dir: &str, input: &[&str], includes: &[&str]) {
         out_dir,
         input,
         includes,
+        customize: Default::default(),
     }).expect("protoc");
 }
 
diff --git a/src/proto/mod.rs b/src/proto/mod.rs
index cac5c49..b703999 100644
--- a/src/proto/mod.rs
+++ b/src/proto/mod.rs
@@ -1,3 +1,4 @@
+#[allow(missing_debug_implementations)]
 mod proof;
 
 use ring::digest::Algorithm;