diff --git a/helm/modelix/values.yaml b/helm/modelix/values.yaml
index adad2b9f..f8452223 100644
--- a/helm/modelix/values.yaml
+++ b/helm/modelix/values.yaml
@@ -105,7 +105,7 @@ db:
 postgres:
   image:
     repository: postgres
-    tag: 17.6@sha256:5250e6187084ddf4ba407027d07eed2419d4656e30821afef43825c6c0d127df
+    tag: 18.4@sha256:f7ce845ee6873dd84be93c9828fe0d1fab0f9707dc9ac569694657398b290bce
     pullPolicy: IfNotPresent
   autoupgrade:
     enabled: false