diff --git a/docs/requirements.txt b/docs/requirements.txt
index f77802f..db1081d 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -4,7 +4,7 @@ sphinx_rtd_theme
 requests_cache
 pydata_sphinx_theme==0.9.0
 ipykernel
-nbsphinx==0.8.9
+nbsphinx==0.9.1
 sphinxcontrib_github_alt==1.2
 commonmark==0.9.1
 recommonmark==0.7.1