diff --git a/pyproject.toml b/pyproject.toml
index 3f00faea0..621f6e24d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,6 +44,7 @@ dev = [
     "sphinx-autobuild",
     "sphinx-copybutton",
     "sphinx-design",
+    "sphinxcontrib-openapi",
     "tox-direct",
     "types-mock",
     "types-PyYAML",