diff --git a/pyproject.toml b/pyproject.toml
index 937fd3590..acabc4cf1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -60,6 +60,7 @@ syrupy = "^3.0.0"
 
 [tool.poetry.group.dev.dependencies]
 mkdocs-rss-plugin = "^1.5.0"
+httpx = "^0.23.1"
 
 [tool.black]
 includes = "src"