diff --git a/Cargo.toml b/Cargo.toml
index 6151739d..4f6084ca 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ smallvec = { version = "1.6", default-features = false, features = ["union"] }
 ahash = { version = "0.7", default-features = false }
 num-traits = { version = "0.2", default_features = false }
 smartstring = { version = "0.2.6", default_features = false }
-rhai_codegen = { version = "0.3.7", path = "codegen", default_features = false }
+rhai_codegen = { version = "0.4.0", path = "codegen", default_features = false }
 
 [features]
 default = ["smartstring/std", "ahash/std", "num-traits/std"] # remove 'smartstring/std' when smartstring is updated to support no-std
diff --git a/codegen/Cargo.toml b/codegen/Cargo.toml
index cfb9d004..53b6ab47 100644
--- a/codegen/Cargo.toml
+++ b/codegen/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rhai_codegen"
-version = "0.3.7"
+version = "0.4.0"
 edition = "2018"
 authors = ["jhwgh1968", "Stephen Chung"]
 description = "Procedural macros support package for Rhai, a scripting language and engine for Rust"