diff --git a/run/filesystem/gcsfuse_run.sh b/run/filesystem/gcsfuse_run.sh
index 07f0b0d1b59..d8eff94f9b6 100755
--- a/run/filesystem/gcsfuse_run.sh
+++ b/run/filesystem/gcsfuse_run.sh
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # [START cloudrun_fuse_script]
+#!/usr/bin/env bash
 set -eo pipefail
 
 # Create mount directory for service
diff --git a/run/filesystem/run.sh b/run/filesystem/run.sh
index 4393ff88b36..b481a724263 100755
--- a/run/filesystem/run.sh
+++ b/run/filesystem/run.sh
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # [START cloudrun_fs_script]
+#!/usr/bin/env bash
 set -eo pipefail
 
 # Create mount directory for service.