diff --git a/clusters/cl01tl/applications/tubearchivist/values.yaml b/clusters/cl01tl/applications/tubearchivist/values.yaml
index 7d83c7a4f..2130d40c7 100644
--- a/clusters/cl01tl/applications/tubearchivist/values.yaml
+++ b/clusters/cl01tl/applications/tubearchivist/values.yaml
@@ -86,7 +86,7 @@ elasticsearch:
     - name: discovery.type
       value: single-node
     - name: xpack.security.enabled
-      value: true
+      value: "true"
   extraEnvVarsSecret: tubearchivist-elasticsearch-secret
   extraConfig:
     path: