diff --git a/composer.json b/composer.json
index cc570e3..05a315a 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "yiisoft/yii2": "*"
+        "yiisoft/yii2": "~2.0"
     },
     "autoload": {
         "psr-4": {