diff --git a/composer.json b/composer.json
index 192dcb9..7527f7c 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "require": {
         "php":                      "^7.1.3|^8.0",
         "symfony/framework-bundle": "~3.4|^4.0|^5.0|^6.0",
-        "symfony/dependency-injection": "~3.4|^4.0|^6.0",
+        "symfony/dependency-injection": "~3.4|^4.0|^5.0|^6.0",
         "michelf/php-markdown":     "~1.4"
     },
     "require-dev": {