diff --git a/book/src/requirements.txt b/book/src/requirements.txt
index 205fb395..a478d3ea 100644
--- a/book/src/requirements.txt
+++ b/book/src/requirements.txt
@@ -10,7 +10,7 @@ pinject==0.14.1
 pip-tools==7.5.1
 pyflakes==3.2.0
 pylint==3.3.9
-pytest==8.4.2
+pytest==9.0.0
 pytest-cov==5.0.0
 pytype==2024.9.13
 requests==2.32.5