diff --git a/instaloader/instaloader.py b/instaloader/instaloader.py
index 8d53231..6022d3e 100644
--- a/instaloader/instaloader.py
+++ b/instaloader/instaloader.py
@@ -579,7 +579,7 @@ class Instaloader:
 
         def _userid_chunks():
             assert userids is not None
-            userids_per_query = 100
+            userids_per_query = 50
             for i in range(0, len(userids), userids_per_query):
                 yield userids[i:i + userids_per_query]