diff --git a/plugins/config/functions b/plugins/config/functions
index 26b09240978..2dbd4fb92f7 100644
--- a/plugins/config/functions
+++ b/plugins/config/functions
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"