diff --git a/charts/kong/CHANGELOG.md b/charts/kong/CHANGELOG.md
index 3e5f8d64f..2802cf5c3 100644
--- a/charts/kong/CHANGELOG.md
+++ b/charts/kong/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## Unreleased
+
+* Upgrade PostgreSQL chart version to prevent from showing OutOfSync in ArgoCD.
+  Please review the [upstream upgrade instructions](https://github.com/bitnami/charts/tree/main/bitnami/postgresql#to-1200) for the subchart.
+
 ## 2.37.1
 
 * Rename the controller status port. This fixes a collision with the proxy status port in the Prometheus ServiceMonitor.
diff --git a/charts/kong/Chart.yaml b/charts/kong/Chart.yaml
index 84e4e2c4f..f835fdeeb 100644
--- a/charts/kong/Chart.yaml
+++ b/charts/kong/Chart.yaml
@@ -12,6 +12,6 @@ version: 2.37.1
 appVersion: "3.6"
 dependencies:
   - name: postgresql
-    version: 11.9.13
+    version: 12.5.8
     repository: https://charts.bitnami.com/bitnami
     condition: postgresql.enabled