diff --git a/web/hooks/slash_command.ts b/web/hooks/slash_command.ts
index 696c5b7..e1798ea 100644
--- a/web/hooks/slash_command.ts
+++ b/web/hooks/slash_command.ts
@@ -20,7 +20,7 @@ export type SlashCommandHookT = {
   slashCommand?: SlashCommandDef;
 };
 
-const slashCommandRegexp = /([^\w]|^)\/[\w\-]*/;
+const slashCommandRegexp = /([^\w:]|^)\/[\w\-]*/;
 
 export class SlashCommandHook implements Hook<SlashCommandHookT> {
   slashCommands = new Map<string, AppSlashCommand>();