diff --git a/book/src/requirements.txt b/book/src/requirements.txt
index 10659bae..5b14456e 100644
--- a/book/src/requirements.txt
+++ b/book/src/requirements.txt
@@ -12,6 +12,6 @@ pyflakes==3.1.0
 pylint==2.17.7
 pytest==7.4.3
 pytest-cov==4.1.0
-pytype==2022.10.26
+pytype==2023.10.31
 requests==2.31.0
 yapf==0.40.2