diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8b3ac40..65d0538 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@ pytest==8.3.4
 flake8==7.1.1
 pytest-cov==6.0.0
 codecov==2.1.13
-httpx==0.27.2
+httpx==0.28.0
 pylint==3.3.2
 certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
 requests>=2.32.0 # not directly required, pinned by Snyk to avoid a vulnerability