diff --git a/pyproject.toml b/pyproject.toml
index d3dec88a..85ab5812 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,7 @@ sphinx-copybutton = { version = "0.5.0", optional = true }
 enum_tools = { version = "0.9.0", optional = true }
 sphinx-toolbox = { version = "2.17.0", optional = true }
 jupytext = { version = "1.13.7", optional = true }
-nbsphinx = { version = "0.8.7", optional = true }
+nbsphinx = { version = "0.8.8", optional = true }
 
 [tool.poetry.extras]
 test = [