diff --git a/composer.json b/composer.json
index 58f23748f313..7a06833ab974 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": ">=5.3.2",
         "doctrine/common": "2.1.*",
-        "monolog/monolog": "1.0.*",
+        "monolog/monolog": ">=1.0,<1.2-dev",
         "swiftmailer/swiftmailer": ">=4.1.2,<4.2-dev",
         "twig/twig": ">=1.1,<2.0-dev"
     },