diff --git a/pyproject.toml b/pyproject.toml
index 30765c94d36c1bc45f1739df4d1a749532eb8409..3e6bbc19a90e043dc2098da81c3093b843ecd7a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ dependencies = [
     "sphinx>=4,<5",
     "sphinx-comments",
     "sphinx-copybutton",
-    "sphinx-external-toc~=0.2.3",
+    "sphinx-external-toc~=0.3.1",
     "sphinx-jupyterbook-latex~=0.4.6",
     "sphinx-design~=0.1.0",
     "sphinx-thebe~=0.2.1",