diff --git a/rustler_codegen/Cargo.toml b/rustler_codegen/Cargo.toml
index 412432d0..96857f1a 100644
--- a/rustler_codegen/Cargo.toml
+++ b/rustler_codegen/Cargo.toml
@@ -15,7 +15,7 @@ proc_macro = true
 [dependencies]
 syn = { version = "2.0", features = ["full", "extra-traits"] }
 quote = "1.0"
-heck = "0.4"
+heck = "0.5"
 proc-macro2 = "1.0"
 
 [dev-dependencies]