diff --git a/package.json b/package.json
index aac3091..0ead717 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   "devDependencies": {
     "@aureooms/js-compare": "^1.4.5",
     "@aureooms/js-functools": "^2.0.3",
-    "@aureooms/js-itertools": "^3.1.0",
+    "@aureooms/js-itertools": "^3.2.1",
     "@aureooms/js-number": "^3.0.0",
     "@aureooms/js-operator": "^1.0.2",
     "@aureooms/js-sort": "^7.0.0",