diff --git a/app-of-apps/templates/apps.yaml b/app-of-apps/templates/apps.yaml
index 757852c..0e8766a 100644
--- a/app-of-apps/templates/apps.yaml
+++ b/app-of-apps/templates/apps.yaml
@@ -220,7 +220,7 @@ spec:
   source:
     chart: oncall
     repoURL: https://grafana.github.io/helm-charts
-    targetRevision: "1.3.3"
+    targetRevision: "1.3.20"
 
     helm:
       values: |