diff --git a/files/routes/admin.py b/files/routes/admin.py
index 66bbedacaa..8f10d03807 100644
--- a/files/routes/admin.py
+++ b/files/routes/admin.py
@@ -1518,6 +1518,11 @@ def ban_domain(v):
 	reason=request.values.get("reason", "").strip()
 	if not reason: abort(400, 'Reason is required!')
 
+	if len(reason) > 100:
+		abort(400, 'Reason is too long (max 100 characters)!')
+
+	reason = filter_emojis_only(reason)
+
 	if len(reason) > 100:
 		abort(400, 'Reason is too long (max 100 characters)!')