diff --git a/hosts/whitelist.txt b/hosts/whitelist.txt
index 218e3aa..a0a7173 100755
--- a/hosts/whitelist.txt
+++ b/hosts/whitelist.txt
@@ -1,6 +1,9 @@
 ## This whitelist maintaince by @ookangzheng
 ## Attribution-NonCommercial 4.0 International (CC BY-NC-SA 4.0)
 
+# Slack
+slackb.com
+
 # Line
 # Report ads website not loading
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