diff --git a/composer.json b/composer.json
index 31530903..d6e9a969 100644
--- a/composer.json
+++ b/composer.json
@@ -46,7 +46,7 @@
     "require": {
         "php": ">=5.3.3",
         "ext-curl": "*",
-        "symfony/event-dispatcher": ">=2.1"
+        "symfony/event-dispatcher": "~2.1"
     },
 
     "autoload": {
@@ -57,12 +57,12 @@
     },
 
     "require-dev": {
-        "doctrine/cache": "*",
-        "symfony/class-loader": "*",
-        "monolog/monolog": "1.*",
-        "psr/log": "1.0.*",
-        "zendframework/zend-cache": "<2.3",
-        "zendframework/zend-log": "<2.3",
+        "doctrine/cache": "~1.3",
+        "symfony/class-loader": "~2.1",
+        "monolog/monolog": "~1.0",
+        "psr/log": "~1.0",
+        "zendframework/zend-cache": "2.*,<2.3",
+        "zendframework/zend-log": "2.*,<2.3",
         "phpunit/phpunit": "3.7.*"
     },