diff --git a/gravity.sh b/gravity.sh
index 40debd61..536cad27 100755
--- a/gravity.sh
+++ b/gravity.sh
@@ -449,7 +449,7 @@ gravity_Whitelist() {
   echo -ne "  ${INFO} ${str}..."
 
   # Print everything from preEventHorizon into whitelistMatter EXCEPT domains in $whitelistFile
-  grep -F -x -v -f "${whitelistFile}" "${piholeDir}/${preEventHorizon}" > "${piholeDir}/${whitelistMatter}"
+  comm -23 "${piholeDir}/${preEventHorizon}" <(sort "${whitelistFile}") > "${piholeDir}/${whitelistMatter}"
 
   echo -e "${OVER}  ${INFO} ${str}"
 }