diff --git a/setup.py b/setup.py
index 85601245..78e022a4 100644
--- a/setup.py
+++ b/setup.py
@@ -68,7 +68,7 @@
             "freezegun>=1.1.0",
             "mypy>=v0.910",
             # Docs.
-            "Sphinx==5.1.1 ; python_version>='3.6'",
+            "Sphinx==5.2.3 ; python_version>='3.6'",
             "sphinx-autobuild==2021.3.14 ; python_version>='3.6'",
             "sphinx-rtd-theme==1.0.0 ; python_version>='3.6'",
             "docutils==0.16 ; python_version>='3.6'",