diff --git a/A_PrepareWork.sh b/A_PrepareWork.sh
index aa8250c..8a1f3e3 100755
--- a/A_PrepareWork.sh
+++ b/A_PrepareWork.sh
@@ -1,4 +1,4 @@
-#~/bin/bash
+#!/bin/bash
 #set -x
 
 lesson=$1