diff --git a/deploy/helm/turnstone/Chart.yaml b/deploy/helm/turnstone/Chart.yaml
index 3e16775a..f1680f0d 100644
--- a/deploy/helm/turnstone/Chart.yaml
+++ b/deploy/helm/turnstone/Chart.yaml
@@ -7,6 +7,6 @@ appVersion: "0.3.0"
 
 dependencies:
   - name: postgresql
-    version: ~18.5.0
+    version: ~18.6.0
     repository: https://charts.bitnami.com/bitnami
     condition: postgresql.enabled