diff --git a/Cargo.toml b/Cargo.toml
index 6c9bf32..3a27933 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,11 +12,11 @@ homepage      = "https://github.com/SpinResearch/merkle_sigs.rs"
 repository    = "https://github.com/SpinResearch/merkle_sigs.rs"
 
 [dependencies]
-ring = "^0.11.0"
-lamport_sigs = "^0.4.0"
+ring = "^0.12.0"
+lamport_sigs = "^0.5.0"
 
 [dependencies.merkle]
-version = "^1.4.0"
+version = "^1.5.0"
 features = ["serialization-protobuf"]
 
 [package.metadata.release]