diff --git a/requirements-dev.txt b/requirements-dev.txt
index ebb2cffc75e..ec896d04ff1 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -21,7 +21,7 @@ flit==3.12.0
 flit_core==3.12.0
 frozenlist==1.7.0
 h11==0.16.0
-h2==4.2.0
+h2==4.3.0
 hpack==4.1.0
 httpcore==1.0.9
 httpx==0.28.1