diff --git a/run_complexfold.sh b/run_complexfold.sh
index 09c3c12..d11d1b1 100755
--- a/run_complexfold.sh
+++ b/run_complexfold.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 # Description: AlphaFold non-docker version
 # Author: Matthias Uthoff