diff --git a/hack/after-build/update-swagger-spec.sh b/hack/after-build/update-swagger-spec.sh
index 05634762a58..1c4b85d582b 100755
--- a/hack/after-build/update-swagger-spec.sh
+++ b/hack/after-build/update-swagger-spec.sh
@@ -50,7 +50,7 @@ kube::etcd::start
 
 # Start kube-apiserver
 kube::log::status "Starting kube-apiserver"
-KUBE_API_VERSIONS="v1" "${KUBE_OUTPUT_HOSTBIN}/kube-apiserver" \
+KUBE_API_VERSIONS="v1,experimental/v1" "${KUBE_OUTPUT_HOSTBIN}/kube-apiserver" \
   --address="127.0.0.1" \
   --public-address-override="127.0.0.1" \
   --port="${API_PORT}" \