diff --git a/everything-app/mailhog4masto.yaml b/everything-app/mailhog4masto.yaml
new file mode 100644
index 0000000..0450eb3
--- /dev/null
+++ b/everything-app/mailhog4masto.yaml
@@ -0,0 +1,14 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: mailhog4masto
+  namespace: argocd
+spec:
+  destination:
+    namespace: mastodon
+    server: https://kubernetes.default.svc
+  project: infra
+  source:
+    chart: redis
+    repoURL: https://codecentric.github.io/helm-charts
+    targetRevision: 5.8.0
diff --git a/everything-app/project-infra.yaml b/everything-app/project-infra.yaml
index 7504886..abe6bfb 100644
--- a/everything-app/project-infra.yaml
+++ b/everything-app/project-infra.yaml
@@ -41,3 +41,4 @@ spec:
     - https://coroot.github.io/helm-charts
     - https://seaweedfs.github.io/seaweedfs-csi-driver/helm
     - https://charts.pascaliske.dev
+    - https://codecentric.github.io/helm-charts