diff --git a/doc/requirements.txt b/doc/requirements.txt
index 980c3ab5f..ddcaabc47 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -5,7 +5,7 @@ sphinx>=6
 MarkupSafe==2.1.5
 readthedocs-sphinx-ext==2.2.0
 nbformat==5.10.4
-nbsphinx==0.9.1
+nbsphinx==0.9.4
 typing_extensions==4.5.0
 sphinx_rtd_theme==2.0.0
 nbclient==0.10.0