diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..46391bd
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,9 @@
+# Change logs
+
+## v1.0.1
+  * Fix issue #7 at #8 by [sanderjongsma](https://github.com/sanderjongsma)
+  * Fix issue #6
+
+## v1.0
+
+  * Lauched
diff --git a/README.md b/README.md
index 7454c5e..537ada6 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 > OneSignal is a high volume and reliable push notification service for websites and mobile applications. We support all major native and mobile platforms by providing dedicated SDKs for each platform, a RESTful server API, and an online dashboard for marketers to design and send push notifications.
 
 ## System requirements
-* **PHP >= 5.4**
+* **PHP >= 5.5
 
 ## Installation
 Using Composer
diff --git a/composer.json b/composer.json
index 443bf52..d1a4962 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     "minimum-stability": "dev",
     "require": {
         "guzzlehttp/guzzle": "^6.1",
-        "php": ">=5.4",
+        "php": ">=5.5",
         "symfony/options-resolver": "^3.2"
     },
     "require-dev": {