diff --git a/Cargo.toml b/Cargo.toml
index af210ea..4659c9d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,8 +12,8 @@ homepage      = "https://github.com/SpinResearch/merkle_sigs.rs"
 repository    = "https://github.com/SpinResearch/merkle_sigs.rs"
 
 [dependencies]
-ring = "^0.12.0"
-lamport_sigs = "^0.5.0"
+ring = "^0.13.0"
+lamport_sigs = "^0.6.0"
 
 [dependencies.merkle]
 version = "^1.7.0"