diff --git a/UpdateVVCLinux.sh b/UpdateVVCLinux.sh
index f1b55cf..fb9b3d3 100644
--- a/UpdateVVCLinux.sh
+++ b/UpdateVVCLinux.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
+sudo apt update && sudo apt upgrade -y
 sudo apt install ffmpeg qt5-default build-essential git -y
-sudo apt update
-git pull
+git pull
\ No newline at end of file
diff --git a/UpdateVVCMacOS.sh b/UpdateVVCMacOS.sh
index d56f171..5950b25 100644
--- a/UpdateVVCMacOS.sh
+++ b/UpdateVVCMacOS.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 brew update
 brew upgrade ffmpeg
-git pull
+git pull
\ No newline at end of file
diff --git a/vvcbuildfraun/BuildforLinux.sh b/vvcbuildfraun/BuildforLinux.sh
index 4df59ff..474171d 100644
--- a/vvcbuildfraun/BuildforLinux.sh
+++ b/vvcbuildfraun/BuildforLinux.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 echo Martin Eesmaa / VVC Compiler (vvenc and vvdec)
 echo We will check packages called: build-essential and cmake
 echo It will check, if the build-essential and cmake packages are installed or not.
diff --git a/vvcbuildfraun/BuildforMacOS.sh b/vvcbuildfraun/BuildforMacOS.sh
index 13bbced..4a2b54d 100644
--- a/vvcbuildfraun/BuildforMacOS.sh
+++ b/vvcbuildfraun/BuildforMacOS.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 echo Martin Eesmaa / VVC Compiler (vvenc and vvdec)
 echo Please make sure your Xcode is installed on your Applications.
 echo.