diff --git a/book/src/requirements.txt b/book/src/requirements.txt
index ec3e92a1..b4190697 100644
--- a/book/src/requirements.txt
+++ b/book/src/requirements.txt
@@ -2,7 +2,7 @@ black==24.10.0
 coverage==7.7.1
 flake8==7.1.2
 hypothesis==6.130.5
-isort==5.13.2
+isort==6.0.1
 MutPy==0.6.1
 mypy==1.15.0
 mypy-extensions==1.0.0