diff --git a/generator/Cargo.toml b/generator/Cargo.toml
index 7d15cf5..73ebace 100644
--- a/generator/Cargo.toml
+++ b/generator/Cargo.toml
@@ -8,7 +8,7 @@ publish = false
 [dependencies]
 bindgen = "0.64"
 heck = "0.4"
-itertools = "0.10"
+itertools = "0.12"
 nom = "7.1"
 once_cell = "1.7"
 proc-macro2 = "1.0"