diff --git a/requirements.txt b/requirements.txt
index 197513f8..9099ed7b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 iso8601==2.1.0
 future==1.0.0
-httpx[http2]==0.27.*
+httpx[http2]==0.28.*