diff --git a/build/build.sh b/build/build.sh
index 51f5598..d3f7c37 100755
--- a/build/build.sh
+++ b/build/build.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Copyright 2016 The Kubernetes Authors.
 #
diff --git a/build/test.sh b/build/test.sh
index 72487a3..42a302f 100755
--- a/build/test.sh
+++ b/build/test.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Copyright 2016 The Kubernetes Authors.
 #