diff --git a/composer.json b/composer.json
index 92455eb..99ac68f 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
         "laminas/laminas-validator": "^2.13",
         "laminas/laminas-stdlib": "^3.2",
         "psr/container": "^1.0",
-        "symfony/config": "^5.0",
+        "symfony/config": "3.4",
         "symfony/process": "^3.4"
     },
     "require-dev": {