diff --git a/requirements-dev.txt b/requirements-dev.txt
index b2fc582..031646c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -35,7 +35,7 @@ h11==0.16.0
     # via
     #   httpcore
     #   uvicorn
-h2==4.2.0
+h2==4.3.0
     # via httpx
 hpack==4.1.0
     # via h2
diff --git a/requirements.txt b/requirements.txt
index 8e3a87e..c7dc65d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ certifi==2025.4.26
     #   httpx
 h11==0.16.0
     # via httpcore
-h2==4.2.0
+h2==4.3.0
     # via httpx
 hpack==4.1.0
     # via h2