diff --git a/CyberChef Update Script.sh b/CyberChef Update Script.sh
index ae8bc51..886a75d 100644
--- a/CyberChef Update Script.sh	
+++ b/CyberChef Update Script.sh	
@@ -1,16 +1,22 @@
 #!/bin/sh
 
+# CyberChef web directory
 CYBERCHEF_DIRECTORY="/var/www/public/cyberchef"
-
 # download srouce code of latest releases page
 HTML_SOURCE=$(wget -O - https://api.github.com/repos/gchq/CyberChef/releases/latest)
-
+# version
+VERSION=$(echo ${HTML_SOURCE} | jq -r .tag_name)
 # get download url
 DOWNLOAD_URL=$(echo ${HTML_SOURCE} | jq -r .assets[].browser_download_url)
-
 # get filename
 FILENAME=$(echo ${HTML_SOURCE} | jq -r .assets[].name)
 
+# test if version is already downloaded
+if [ $(ls ${CYBERCHEF_DIRECTORY}/*${VERSION}* | wc -l) -gt 0 ]; then
+	echo "Version is already downloaded"
+	exit
+fi
+
 # download file
 wget -P ${CYBERCHEF_DIRECTORY} ${DOWNLOAD_URL}