diff --git a/kube/deploy/apps/firefly/ks.yaml b/kube/deploy/apps/firefly/ks.yaml
index 67f8eb4f..edc1db09 100644
--- a/kube/deploy/apps/firefly/ks.yaml
+++ b/kube/deploy/apps/firefly/ks.yaml
@@ -44,4 +44,4 @@ spec:
   dependsOn: []
   postBuild:
     substitute:
-      AUTHENTIK_PROXY_HOST: "${APP_DNS_FIREFLY}"
+      AUTHENTIK_PROXY_HOST: "${APP_DNS_FIREFLY:=firefly}"
diff --git a/kube/deploy/apps/media/navidrome/ks.yaml b/kube/deploy/apps/media/navidrome/ks.yaml
index e662b00e..86761961 100644
--- a/kube/deploy/apps/media/navidrome/ks.yaml
+++ b/kube/deploy/apps/media/navidrome/ks.yaml
@@ -45,4 +45,4 @@ spec:
     - name: authentik-app
   postBuild:
     substitute:
-      AUTHENTIK_PROXY_HOST: "${APP_DNS_NAVIDROME}"
+      AUTHENTIK_PROXY_HOST: "${APP_DNS_NAVIDROME:=navidrome}"