diff --git a/symfony/mattermost-notifier/5.1/manifest.json b/symfony/mattermost-notifier/5.1/manifest.json
new file mode 100644
index 00000000..bd115a0e
--- /dev/null
+++ b/symfony/mattermost-notifier/5.1/manifest.json
@@ -0,0 +1,5 @@
+{
+    "env": {
+        "#1": "MATTERMOST_DSN=mattermost://TOKEN@HOST?channel=CHANNEL"
+    }
+}