diff --git a/src/unstructured_client/_hooks/custom/split_pdf_hook.py b/src/unstructured_client/_hooks/custom/split_pdf_hook.py
index 7860d9bc..3a2b91c0 100644
--- a/src/unstructured_client/_hooks/custom/split_pdf_hook.py
+++ b/src/unstructured_client/_hooks/custom/split_pdf_hook.py
@@ -40,8 +40,8 @@
 
 DEFAULT_STARTING_PAGE_NUMBER = 1
 DEFAULT_ALLOW_FAILED = False
-DEFAULT_CONCURRENCY_LEVEL = 8
-MAX_CONCURRENCY_LEVEL = 15
+DEFAULT_CONCURRENCY_LEVEL = 10
+MAX_CONCURRENCY_LEVEL = 50
 MIN_PAGES_PER_SPLIT = 2
 MAX_PAGES_PER_SPLIT = 20