diff --git a/charts/mcp-auth-proxy/templates/registry-secret.yaml b/charts/mcp-auth-proxy/templates/registry-secret.yaml
index 9952150..f3c23a1 100644
--- a/charts/mcp-auth-proxy/templates/registry-secret.yaml
+++ b/charts/mcp-auth-proxy/templates/registry-secret.yaml
@@ -17,6 +17,7 @@ spec:
     type: kubernetes.io/dockerconfigjson
     template:
       engineVersion: v2
+      mergePolicy: Replace
       data:
         # When forking: update host/user to match your registry
         .dockerconfigjson: '{"auths":{"{{ $host }}":{"username":"{{ $user }}","password":"{{ "{{" }} .registry_token {{ "}}" }}","auth":"{{ "{{" }} printf "{{ $user }}:%s" .registry_token | b64enc {{ "}}" }}"}}}'