diff --git a/code/Ch12/pyproject.toml b/code/Ch12/pyproject.toml
index fe52026..613d45a 100644
--- a/code/Ch12/pyproject.toml
+++ b/code/Ch12/pyproject.toml
@@ -93,7 +93,7 @@ dependencies = [
     "traitlets==5.14.3",
     "typing-extensions==4.15.0",
     "tzdata==2025.2",
-    "urllib3==2.5.0",
+    "urllib3==2.6.0",
     "wcwidth==0.2.14",
     "xarray==2025.10.1",
     "xgboost==3.0.5",