diff --git a/package.json b/package.json
index 77df018..67702a5 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "@aureooms/js-heapq": "^3.0.0"
   },
   "devDependencies": {
-    "@aureooms/js-itertools": "^3.1.0",
+    "@aureooms/js-itertools": "^3.1.1",
     "ava": "^0.18.0",
     "babel-cli": "^6.18.0",
     "babel-polyfill": "^6.16.0",