diff --git a/main.py b/main.py
index 435f946..07e0ca2 100644
--- a/main.py
+++ b/main.py
@@ -74,6 +74,10 @@ def send_message(text):
         print(f"❌ Failed to send message: {response.text}")
 
 
+def is_entries_valid(entries: list) -> bool:
+    return 0 < len(entries) < 10
+
+
 def main() -> None:
     previous_data = load_blackouts()
     updated_data = previous_data.copy()
@@ -84,6 +88,11 @@ def main() -> None:
 
         new_entries = [entry for entry in new_blackouts if entry not in old_blackouts]
 
+        if not is_entries_valid(new_entries):
+            print('unusual entries was received. count:', len(new_entries))
+            print(json.dumps(new_entries, ensure_ascii=False, indent=2))
+            continue
+
         for entry in new_entries:
             message = format_message(bill_id, entry)
             send_message(message)