diff --git a/VARIABLES.md b/VARIABLES.md
index 2ef0cdf..990e045 100644
--- a/VARIABLES.md
+++ b/VARIABLES.md
@@ -51,6 +51,7 @@ If both whitelisting and blacklisting are set, only the whitelisting will be act
 * `Instance:FailingTwitterUserCleanUpThreshold` (default: 700) set the max allowed errors (due to a banned/deleted/private account) from a Twitter Account retrieval before auto-removal. (by default an account is called every 15 mins)
 * `Instance:FailingFollowerCleanUpThreshold` (default: 30000) set the max allowed errors from a Follower (Fediverse) Account before auto-removal. (often due to account suppression, instance issues, etc)
 * `Instance:UserCacheCapacity` (default: 10000) set the caching limit of the Twitter User retrieval. Must be higher than the number of synchronized accounts on the instance.
+* `Instance:IpWhiteListing` IP Whitelisting (separated by `;`), prevent usage of the instance from other IPs than those provided (if provided).
 
 # Docker Compose full example