diff --git a/overlays/prod/kustomization.yaml b/overlays/prod/kustomization.yaml
index 467f51af..1741fd2e 100644
--- a/overlays/prod/kustomization.yaml
+++ b/overlays/prod/kustomization.yaml
@@ -17,7 +17,7 @@ images:
 - name: ghcr.io/biosimulations/dispatch-service
   newTag: v9.62.3
 - name: ghcr.io/biosimulations/mail-service
-  newTag: v9.62.3
+  newTag: v9.64.0
 - name: ghcr.io/biosimulations/simdata-api
   newTag: v9.62.3
 - name: ghcr.io/biosimulations/simulators-api