diff --git a/Cargo.toml b/Cargo.toml
index edddbcf..7abb807 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ readme = "README.md"
 
 [dependencies]
 serde = "^1.0"
-serde_derive = "^1.0"
+serde_derive = "^1.0.175"
 tiny-keccak = { version = "2.0.2", features = ["keccak"] }
 secp256k1 = {version = "0.27.0", features = ["recovery"] }
 rlp = "0.5.2"