diff --git a/pyproject.toml b/pyproject.toml
index c5153038bcb278f8c94c8aac61d0c5ae71d1fc64..e3a36c75e7154d67bc2aa4b39bfcca1d7deb2259 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,6 +34,7 @@ doc = [
   "matplotlib",
   "sphinx",
   "sphinx_rtd_theme",
+  "pandoc",
   "nbsphinx",
   "notebook",
   "chardet",