diff --git a/tools/update_notice.sh b/tools/update_notice.sh
index 9974da2..0b8a106 100755
--- a/tools/update_notice.sh
+++ b/tools/update_notice.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..
 ./libc/tools/generate-NOTICE.py libc libdl libm linker libstdc++ > libc/NOTICE
diff --git a/tools/update_seccomp.sh b/tools/update_seccomp.sh
index d108e35..b9e53aa 100755
--- a/tools/update_seccomp.sh
+++ b/tools/update_seccomp.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..
 ./libc/tools/genseccomp.py
diff --git a/tools/update_syscalls.sh b/tools/update_syscalls.sh
index 3ad95ed..5e7eb0a 100755
--- a/tools/update_syscalls.sh
+++ b/tools/update_syscalls.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..
 ./libc/tools/gensyscalls.py
diff --git a/tools/update_version_scripts.sh b/tools/update_version_scripts.sh
index ccba475..2c3a5b4 100755
--- a/tools/update_version_scripts.sh
+++ b/tools/update_version_scripts.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..
 ./libc/tools/genversion-scripts.py