diff --git a/pyproject.toml b/pyproject.toml
index 55df656a..5d81c753 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,7 +49,7 @@ dynamic = ["version"]
 docs = [
   "ipykernel>=6.13.0",
   "nbconvert>=7.0.0,<7.17",
-  "nbsphinx>=0.8.8,<0.9.5",
+  "nbsphinx>=0.8.8,<0.9.6",
   "pandoc",
   "pybtex",
   "pydata-sphinx-theme>=0.12",