diff --git a/ch02/requirements.txt b/ch02/requirements.txt
index f664913e..2a87c5b9 100644
--- a/ch02/requirements.txt
+++ b/ch02/requirements.txt
@@ -2,7 +2,7 @@ anyio==3.6.1
 click==8.1.3
 colorama==0.4.5
 fastapi==0.78.0
-h11==0.13.0
+h11==0.16.0
 idna==3.3
 pydantic==1.9.1
 python-multipart==0.0.5