diff --git a/composer.json b/composer.json
old mode 100755
new mode 100644
index a40f67a..0172000
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     "require-dev": {
         "phpunit/phpunit": "~4.8",
         "satooshi/php-coveralls": "~1.0",
-        "squizlabs/php_codesniffer": "~2.6",
+        "squizlabs/php_codesniffer": "~3.8",
         "friendsofphp/php-cs-fixer": "~1.12"
     },
     "autoload": {