diff --git a/composer.json b/composer.json
index 356069a..429bb0a 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
 		"phpstan/phpstan-deprecation-rules": "^2.0",
         "phan/phan": "^5.4",
         "egrajp/smarty-extended": "^5.4",
-        "gullevek/dotenv": "dev-master",
+        "gullevek/dotenv": "^3",
         "phpunit/phpunit": "^9"
     },
     "repositories": [{