diff --git a/composer.json b/composer.json
index af0135d..9a38331 100644
--- a/composer.json
+++ b/composer.json
@@ -16,10 +16,11 @@
         "issues": "https://issues.apache.org/jira/browse/THRIFT"
     },
     "require": {
-        "php": ">=5.3.3"
+        "php": "^5.5 || ^7.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.8.36"
+        "phpunit/phpunit": "~4.8.36",
+        "squizlabs/php_codesniffer": "3.*"
     },
     "autoload": {
         "psr-4": {"Thrift\\": "lib/php/lib/"}