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