diff --git a/apps/sonar/index.yaml b/apps/sonar/index.yaml
index d0a4576..54f2616 100644
--- a/apps/sonar/index.yaml
+++ b/apps/sonar/index.yaml
@@ -111,18 +111,42 @@ options:
     type: string
   images:
     default:
+      postgresql:
+        registry: ghcr.io
+        repository: cloudnative-pg/postgresql
+        tag: 15.3
       sonar:
         pull_policy: IfNotPresent
         registry: docker.io
         repository: sonarqube
         tag: 10.5.1-community
     examples:
-    - sonar:
+    - postgresql:
+        registry: ghcr.io
+        repository: cloudnative-pg/postgresql
+        tag: 15.3
+      sonar:
         pull_policy: IfNotPresent
         registry: docker.io
         repository: sonarqube
         tag: 10.5.1-community
     properties:
+      postgresql:
+        default:
+          registry: ghcr.io
+          repository: cloudnative-pg/postgresql
+          tag: 15.3
+        properties:
+          registry:
+            default: ghcr.io
+            type: string
+          repository:
+            default: cloudnative-pg/postgresql
+            type: string
+          tag:
+            default: 15.3
+            type: number
+        type: object
       sonar:
         default:
           pull_policy: IfNotPresent