diff --git a/package.json b/package.json
index 9287827..e0d5dcd 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "devDependencies": {
     "@aureooms/js-array": "^4.0.0",
     "@aureooms/js-functools": "^2.0.3",
-    "@aureooms/js-itertools": "^3.1.1",
+    "@aureooms/js-itertools": "^3.2.1",
     "ava": "^0.19.1",
     "babel-cli": "^6.18.0",
     "babel-polyfill": "^6.16.0",