diff --git a/src/VahterBanBot/Types.fs b/src/VahterBanBot/Types.fs
index dc7f0af..5f22a87 100644
--- a/src/VahterBanBot/Types.fs
+++ b/src/VahterBanBot/Types.fs
@@ -13,6 +13,7 @@ type BotConfiguration =
       AllowedUsers: Dictionary<string, int64>
       ShouldDeleteChannelMessages: bool }
 
+[<CLIMutable>]
 type User =
     { Id: int64
       Username: string option