diff --git a/argocd/apps/mattermost/mmm-initcontainer.yaml b/argocd/apps/mattermost/mmm-initcontainer.yaml
new file mode 100644
index 0000000..fb069e9
--- /dev/null
+++ b/argocd/apps/mattermost/mmm-initcontainer.yaml
@@ -0,0 +1,9 @@
+extraInitContainers:
+  - name: fix-permissions
+    image: busybox
+    command: ["sh", "-c", "chown -R 2000:2000 /mattermost/data"]
+    volumeMounts:
+      - name: mattermost-data
+        mountPath: /mattermost/data
+    securityContext:
+      runAsUser: 0