diff --git a/README.md b/README.md
index 21eff63..094074d 100644
--- a/README.md
+++ b/README.md
@@ -397,7 +397,7 @@ Python 3.
 - 4. Python 2 doesn't support yield from or returning values from generators.
 
 
-### [Item 41: Consider concurrent.futures for true parallelism](item_41_consider+concurrent_futures.py)
+### [Item 41: Consider concurrent.futures for true parallelism](item_41_consider_concurrent_futures.py)
 - 1. Moving CPU bottlenecks to C-extension modules can be an effective way to
     improve performance while maximizing your investment in Python code.
     However, the cost of doing so is high and may introduce bugs.