diff --git a/composer.json b/composer.json
index 0cc13391bc..880145d16b 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "psr/http-server-handler": "^1",
         "psr/http-server-middleware": "^1",
         "psr/simple-cache": "^1.0.1",
-        "symfony/cache": "^4.3 | ^5",
+        "symfony/cache": "^4.3 | ^5 | ^6",
         "symfony/expression-language": "^4 | ^5",
         "thecodingmachine/cache-utils": "^1",
         "thecodingmachine/class-explorer": "^1.1.0",