diff --git a/composer.json b/composer.json
index 2dc34e8..fd41fef 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     ],
     "require": {
         "yiisoft/yii2": "*",
-        "twbs/bootstrap": "3.1.*"
+        "twbs/bootstrap": "3.1.* | 3.0.*"
     },
     "autoload": {
         "psr-4": {