diff --git a/packages/backend/src/common/command.guard.ts b/packages/backend/src/common/command.guard.ts
index 09d24054..43ae479c 100644
--- a/packages/backend/src/common/command.guard.ts
+++ b/packages/backend/src/common/command.guard.ts
@@ -31,6 +31,8 @@ export class CommandGuard implements CanActivate {
               '}',
               `
 `,
+              `!`,
+              '`',
             ])))
       )
     ) {