diff --git a/scripts/draw.py b/scripts/draw.py
index 1aadccc..3231aaf 100644
--- a/scripts/draw.py
+++ b/scripts/draw.py
@@ -11,6 +11,7 @@
 import argparse
 from urllib.request import Request, urlopen
 from urllib.error import HTTPError
+import hashlib
 
 parser = argparse.ArgumentParser(
     description='Draw currently available lotteries')
@@ -50,6 +51,14 @@ def post_json(path, data=None, token=None):
         return json.loads(response_body)
 
 
+with open(args.list, 'r') as f:
+    local_checksum = hashlib.sha256(f.read().encode()).hexdigest()
+    server_checksum = post_json('ids_hash')['sha256']
+    if local_checksum != server_checksum:
+        print('local ids.json is different from servers', file=sys.stderr)
+        sys.exit(70)  # we should decide error code
+
+
 # Login as admin
 admin_cred = {
     'id': admin_ids['secret_id'],