diff --git a/pyproject.toml b/pyproject.toml
index 079090c..f9e35b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ docs = [
     "sphinx-autodoc-typehints==1.22.0",
     "asteroid-sphinx-theme==0.0.3",
     "sphinx_rtd_theme==1.2.0",
-    "m2r2==0.3.2",
+    "m2r2==0.3.4",
 ]
 lint = ["black", "isort"]
 
diff --git a/requirements.txt b/requirements.txt
index 1d55cbb..7de887b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -89,7 +89,7 @@ kiwisolver==1.4.5
     # via matplotlib
 llvmlite==0.43.0
     # via numba
-m2r2==0.3.2
+m2r2==0.3.4
     # via bromodels (pyproject.toml)
 markupsafe==2.1.5
     # via jinja2