diff --git a/README.md b/README.md
index dcd837e..095d5e4 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ php-client for [telegram-cli](https://github.com/vysheng/tg/)
 Requirements
 ------------
  - a running [telegram-cli](https://github.com/vysheng/tg/) listening on a unix-socket (`-S`) or a port (`-P`). Needs to be configured already (phone-number, etc.).
- - php >= 5.4.0
+ - php >= 5.3.0
 
 Usage
 -----
diff --git a/composer.json b/composer.json
index 118d771..1a5dbd7 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": ">=5.4.0,<6.0.0"
+        "php": ">=5.3.0,<6.0.0"
     },
     "autoload": {
         "psr-0": {