diff --git a/package.json b/package.json
index 905e90c..07bc42a 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "url": "git://github.com/kamicane/prime.git"
   },
   "dependencies": {
-    "mout": "~0.9"
+    "mout": "^0.10.0"
   },
   "devDependencies": {
     "mocha": ">=1.18.2 < 2.0.0",