diff --git a/pyproject.toml b/pyproject.toml
index 60f7db4..180c149 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ docs = [
     "sphinx-book-theme>=1.0.1",
     "readthedocs-sphinx-search>=0.3.2",
     "nbsphinx>=0.9.2",
-    "sphinx_gallery>=0.14.0",
+    "sphinx_gallery>=0.21.0",
 ]
 notebook = [
     "IPython",