diff --git a/pyproject.toml b/pyproject.toml
index c99c5bb..a63a2ac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ dev = [
   "pre-commit==3.2.2",
 ]
 doc = [
-  "m2r2==0.3.2",
+  "m2r2==0.3.3.post2",
   "sphinxcontrib-apidoc==0.3.0",
   "sphinx_rtd_theme==1.2.0",
 ]