diff --git a/composer.json b/composer.json
index 2637f8c..a7d907c 100644
--- a/composer.json
+++ b/composer.json
@@ -20,8 +20,8 @@
         "php": ">=7.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "*",
-        "squizlabs/php_codesniffer": "3.0.x-dev"
+        "phpunit/phpunit": "~8.0",
+        "squizlabs/php_codesniffer": "~3.0"
     },
     "autoload": {
         "psr-4": {