diff --git a/pyproject.toml b/pyproject.toml
index 63f1361..85e312c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ requires-python = ">=3.8"
 dev = ["pre-commit==2.17.0"]
 docs = [
   "numpydoc==1.3.1",
-  "sphinx==5.0.2",
+  "sphinx==6.1.0",
   "furo==2022.6.21",
   "m2r2==0.3.2",
   "ipython==8.4.0",