diff --git a/charts/root/templates/prometheus/app.yaml b/charts/root/templates/prometheus/app.yaml
index 497a65f0..5535bd88 100644
--- a/charts/root/templates/prometheus/app.yaml
+++ b/charts/root/templates/prometheus/app.yaml
@@ -12,7 +12,7 @@ spec:
   source:
     chart: kube-prometheus-stack
     repoURL: https://prometheus-community.github.io/helm-charts
-    targetRevision: 66.3.0
+    targetRevision: 66.3.1
     helm:
       valuesObject:
         alertmanager: