diff --git a/composer.json b/composer.json
index eaa976c16..6fd0d219f 100644
--- a/composer.json
+++ b/composer.json
@@ -30,7 +30,7 @@
         "symfony/process": "~2.1@dev"
     },
     "require-dev": {
-        "phpunit/phpunit": "3.7.*"
+        "phpunit/phpunit": "~3.7.10"
     },
     "suggest": {
         "ext-zip": "Enabling the zip extension allows you to unzip archives, and allows gzip compression of all internet traffic",
diff --git a/composer.lock b/composer.lock
index ffdb0b539..95a7c2db5 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,5 +1,5 @@
 {
-    "hash": "b7537d80d94e19d0b668b9a88d9f8262",
+    "hash": "38828459a269ef0e409883721853d7fe",
     "packages": [
         {
             "name": "justinrainbow/json-schema",