diff --git a/Resources/config/imagine.xml b/Resources/config/imagine.xml
index f2b0c8183..333ca1314 100644
--- a/Resources/config/imagine.xml
+++ b/Resources/config/imagine.xml
@@ -99,7 +99,7 @@
             <argument type="service" id="liip_imagine.cache.signer" />
         </service>
 
-        <service id="liip_imagine.meta_data.reader" class="%liip_imagine.meta_data.reader.class%" />
+        <service id="liip_imagine.meta_data.reader" class="%liip_imagine.meta_data.reader.class%" public="false" />
 
         <!-- ImagineInterface instances -->
 
diff --git a/composer.json b/composer.json
index 4c18941c9..cc1889179 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     },
     "require": {
         "php":                      ">=5.3.2",
-        "imagine/Imagine":          "~0.5",
+        "imagine/Imagine":          "~0.5,<0.7",
         "symfony/finder":           "~2.3",
         "symfony/filesystem":       "~2.3",
         "symfony/options-resolver": "~2.3",