diff --git a/composer.json b/composer.json
index 44fbccde..884c41e7 100644
--- a/composer.json
+++ b/composer.json
@@ -83,6 +83,9 @@
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     "config": {
+        "platform": {
+            "php": "5.5.9"
+        },
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diff --git a/composer.lock b/composer.lock
index 638e3b1b..eb0a8a03 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,8 @@
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     ],
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-    "content-hash": "d73310d7327fc68c212b2fb76f30ee7d",
+    "hash": "4b5a5184752be8d270d8be97d85d26fd",
+    "content-hash": "dc1e35be9fd2c68b8409f2512d3daed6",
     "packages": [
         {
             "name": "alt-three/emoji",
@@ -3927,16 +3927,16 @@
         },
         {
             "name": "phpunit/phpunit-mock-objects",
-            "version": "2.3.7",
+            "version": "2.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit-mock-objects.git",
-                "reference": "5e2645ad49d196e020b85598d7c97e482725786a"
+                "reference": "ac8e7a3db35738d56ee9a76e78a4e03d97628983"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit-mock-objects/zipball/5e2645ad49d196e020b85598d7c97e482725786a",
-                "reference": "5e2645ad49d196e020b85598d7c97e482725786a",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit-mock-objects/zipball/ac8e7a3db35738d56ee9a76e78a4e03d97628983",
+                "reference": "ac8e7a3db35738d56ee9a76e78a4e03d97628983",
                 "shasum": ""
             },
             "require": {
@@ -3979,7 +3979,7 @@
                 "mock",
                 "xunit"
             ],
-            "time": "2015-08-19 09:14:08"
+            "time": "2015-10-02 06:51:40"
         },
         {
             "name": "sebastian/comparator",
@@ -4410,5 +4410,8 @@
     "platform": {
         "php": "^5.5.9"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "platform-overrides": {
+        "php": "5.5.9"
+    }
 }