diff --git a/Makefile b/Makefile
index 402171d2..b0e2b452 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-SHELL := /bin/bash
+SHELL := /usr/bin/env bash
 
 # allow optional per-repo overrides
 -include Makefile.overrides.mk
diff --git a/common/.commonfiles.sha b/common/.commonfiles.sha
index 8ffdb111..e9fd6c35 100644
--- a/common/.commonfiles.sha
+++ b/common/.commonfiles.sha
@@ -1 +1 @@
-bd7126fd447f48a5ae17590921baca332ab0593c
+410e7d88eae562d4cef8d48fbc56099e270202b2
diff --git a/common/scripts/run.sh b/common/scripts/run.sh
index 7a7a4d5b..e9629a39 100755
--- a/common/scripts/run.sh
+++ b/common/scripts/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # WARNING: DO NOT EDIT, THIS FILE IS PROBABLY A COPY
 #
diff --git a/common/scripts/setup_env.sh b/common/scripts/setup_env.sh
index 728a26cf..f2da1219 100755
--- a/common/scripts/setup_env.sh
+++ b/common/scripts/setup_env.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # shellcheck disable=SC2034
 
 # WARNING: DO NOT EDIT, THIS FILE IS PROBABLY A COPY