diff --git a/chain-impl-mockchain/Cargo.toml b/chain-impl-mockchain/Cargo.toml
index 5a335e137..98ea6f132 100644
--- a/chain-impl-mockchain/Cargo.toml
+++ b/chain-impl-mockchain/Cargo.toml
@@ -18,7 +18,7 @@ rand_core = "0.6"
 imhamt = { path = "../imhamt" }
 sparse-array = { path = "../sparse-array" }
 strum = "0.23.0"
-strum_macros = "0.23.1"
+strum_macros = "0.24.3"
 hex = { version = "0.4.2", default-features = false, features = [ "std" ] }
 quickcheck = { version = "0.9", optional = true }
 quickcheck_macros = { version = "0.9", optional = true }