diff --git a/jacquesndl/mailer-bundle/1.0/manifest.json b/jacquesndl/mailer-bundle/1.0/manifest.json
index 1ae1c4f1..abfa9e0b 100755
--- a/jacquesndl/mailer-bundle/1.0/manifest.json
+++ b/jacquesndl/mailer-bundle/1.0/manifest.json
@@ -8,5 +8,9 @@
     "env": {
         "JACQUESNDL_MAILER_SENDER_NAME": "Example",
         "JACQUESNDL_MAILER_SENDER_ADDRESS": "example@domain.tld"
+    },
+    "conflict": {
+        "symfony/framework-bundle": "<4.4",
+        "symfony/twig-bundle": "<4.4"
     }
 }