diff --git a/by-language/python-turbodbc/requirements-prereq.txt b/by-language/python-turbodbc/requirements-prereq.txt
index 4cce7b86..c44f8306 100644
--- a/by-language/python-turbodbc/requirements-prereq.txt
+++ b/by-language/python-turbodbc/requirements-prereq.txt
@@ -1,4 +1,4 @@
 # Turbodbc wants NumPy and PyArrow to be installed upfront.
 numpy>=2
-pyarrow<20
+pyarrow<21
 wheel