diff --git a/common/playbooks/k8s.yaml b/common/playbooks/k8s.yaml
index b719e419beb6a2d093b3559e1528ec54be86ed29..058919ee69c8121f6a5ad108dc726d5b865ede76 100644
--- a/common/playbooks/k8s.yaml
+++ b/common/playbooks/k8s.yaml
@@ -358,7 +358,7 @@
           --set controller.service.type=NodePort
           --set controller.service.externalIPs={{ '{' + hostvars[groups['ingress'][0]].ansible_default_ipv4.address + '}' }}
           --set controller.config.proxy-body-size=0
-          --set controller.config.hide_headers='x-jupyterhub-version'
+          --set controller.config.hide-headers='x-jupyterhub-version'
           --set controller.allowSnippetAnnotations=false
           --set controller.addHeaders.X-Content-Type-Options=nosniff
           --set controller.addHeaders.Referrer-Policy=no-referrer