diff --git a/code/Ch11/pyproject.toml b/code/Ch11/pyproject.toml
index c020256..15df637 100644
--- a/code/Ch11/pyproject.toml
+++ b/code/Ch11/pyproject.toml
@@ -5,7 +5,7 @@ description = "Add your description here"
 requires-python = ">=3.13.5"
 dependencies = [
     "aiohappyeyeballs==2.6.1",
-    "aiohttp==3.13.0",
+    "aiohttp==3.13.3",
     "aiosignal==1.4.0",
     "appnope==0.1.4",
     "asttokens==3.0.0",
diff --git a/code/Ch11/requirements.in b/code/Ch11/requirements.in
index 3e89d90..f4cfba3 100644
--- a/code/Ch11/requirements.in
+++ b/code/Ch11/requirements.in
@@ -1,4 +1,4 @@
-aiohttp==3.13.0
+aiohttp==3.13.3
 darts==0.38.0
 ipykernel==6.30.1
 pipdeptree==2.28.0