diff --git a/private-captcha/composer.json b/private-captcha/composer.json
index bda5f6e..01e11b8 100644
--- a/private-captcha/composer.json
+++ b/private-captcha/composer.json
@@ -9,7 +9,7 @@
     "require-dev": {
         "phpstan/phpstan": "^1.0",
         "wp-coding-standards/wpcs": "^3.0",
-        "squizlabs/php_codesniffer": "^3.0",
+        "squizlabs/php_codesniffer": "^4.0",
         "dealerdirect/phpcodesniffer-composer-installer": "^1.0",
         "szepeviktor/phpstan-wordpress": "^1.3"
     },