diff --git a/update_iso.sh b/update_iso.sh
index 8f9bc6b..69e2c45 100755
--- a/update_iso.sh
+++ b/update_iso.sh
@@ -12,7 +12,7 @@ dl_iso() {
   DATE=$(date --date '30 days ago' +%Y-%m-%d)
 
   # If the file doesn't already exist and not older than 30 days
-  if [ ! `find . -samefile ${ISO_PATH} -newerct ${DATE}` ]; then
+	if [ ! "$(find . -samefile "${ISO_PATH}" -newerct "${DATE}")" ]; then
     wget "${URL}" -O "${ISO_PATH}"
   fi
 }