diff --git a/composer.json b/composer.json
index 589f0ed..53cc98b 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
     },
     "require":{
         "php":">=5.3.3",
-        "zendframework/zend-json":"~2.1.2"
+        "zendframework/zend-json":">=2.2.1"
     },
     "require-dev":{
         "symfony/event-dispatcher":"~2.1"