diff --git a/book/src/requirements.txt b/book/src/requirements.txt
index b44148e7..d652df90 100644
--- a/book/src/requirements.txt
+++ b/book/src/requirements.txt
@@ -11,7 +11,7 @@ pip-tools==7.4.1
 pyflakes==3.2.0
 pylint==3.3.7
 pytest==8.4.1
-pytest-cov==5.0.0
+pytest-cov==6.2.1
 pytype==2024.9.13
 requests==2.32.4
 yapf==0.43.0