diff --git a/staging/src/k8s.io/sample-apiserver/hack/update-codegen.sh b/staging/src/k8s.io/sample-apiserver/hack/update-codegen.sh
index 7b01b94ffc8..378ccc0ae4b 100755
--- a/staging/src/k8s.io/sample-apiserver/hack/update-codegen.sh
+++ b/staging/src/k8s.io/sample-apiserver/hack/update-codegen.sh
@@ -25,13 +25,13 @@ CODEGEN_PKG=${CODEGEN_PKG:-$(cd "${SCRIPT_ROOT}"; ls -d -1 ./vendor/k8s.io/code-
 # --output-base    because this script should also be able to run inside the vendor dir of
 #                  k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
 #                  instead of the $GOPATH directly. For normal projects this can be dropped.
-"${CODEGEN_PKG}/generate-groups.sh" all \
+bash "${CODEGEN_PKG}/generate-groups.sh" all \
   k8s.io/sample-apiserver/pkg/generated k8s.io/sample-apiserver/pkg/apis \
   "wardle:v1alpha1,v1beta1" \
   --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
   --go-header-file "${SCRIPT_ROOT}"/hack/boilerplate.go.txt
 
-"${CODEGEN_PKG}/generate-internal-groups.sh" "deepcopy,defaulter,conversion" \
+bash "${CODEGEN_PKG}/generate-internal-groups.sh" "deepcopy,defaulter,conversion" \
   k8s.io/sample-apiserver/pkg/generated k8s.io/sample-apiserver/pkg/apis k8s.io/sample-apiserver/pkg/apis \
   "wardle:v1alpha1,v1beta1" \
   --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \