diff --git a/.github/prepare_release.sh b/.github/prepare_release.sh
index 9c8c9202..621a6539 100644
--- a/.github/prepare_release.sh
+++ b/.github/prepare_release.sh
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 is_minor="$1"    # type is "minor" or "patch"
 is_patch="$2"    # type is "minor" or "patch"