diff --git a/build.sh b/build.sh
index b86066d..ce2b8a0 100755
--- a/build.sh
+++ b/build.sh
@@ -1,2 +1,4 @@
+#!/bin/sh
+set -e  # if compilation fail next command will not be executed, so older version of programm will not be launched
 g++ src/DosAtk.cpp -o DosAtk -lcurl -lssl -lcrypto
 ./DosAtk "$@"