diff --git a/package.json b/package.json
index 5ba9952..74f0000 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
 		"aureooms-js-array": "^2.0.1",
 		"aureooms-js-compare": "^1.3.0",
 		"aureooms-js-functools": "^1.2.0",
-		"aureooms-js-itertools": "^0.2.0",
+		"aureooms-js-itertools": "^3.1.1",
 		"aureooms-js-operator": "^1.0.0",
 		"aureooms-js-random": "^0.0.3",
 		"aureooms-js-sort": "^3.1.0",