diff --git a/pyproject.toml b/pyproject.toml
index 00d8a907..d8e0f7d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ docs = [
     "furo==2024.5.6",
     "ipython==8.23.0",
     "myst_parser==2.0.0",
-    "nbsphinx==0.9.3",
+    "nbsphinx==0.9.4",
     "sphinx-copybutton==0.5.2",
     "sphinx==7.3.7",
 ]