diff --git a/setup.py b/setup.py
index 2d13aeeb..29962155 100644
--- a/setup.py
+++ b/setup.py
@@ -66,6 +66,7 @@ setup(
     setup_requires=["pytest-runner"],
     extras_require={
         "docs": [
+            "Sphinx==5.3.0",
             "furo==2022.12.7",
             "sphinx-autobuild",
             "codespell",