diff --git a/prometheus/values.yaml b/prometheus/values.yaml
index 62cc1a0..decfb70 100644
--- a/prometheus/values.yaml
+++ b/prometheus/values.yaml
@@ -1,6 +1,7 @@
 alertmanager:
   image:
     repository: aaronriedel/alertmanager
+    tag: "latest"
   extraSecretMounts:
    - name: telegram-api
      mountPath: /etc/alertmanager/telegram-token