diff --git a/pyproject.toml b/pyproject.toml
index cfc87017b..d632fae2b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,6 +74,12 @@ black = "23.9.1"
 pre-commit = "^3.5.0"
 rlberry-research = {git = "https://github.com/rlberry-py/rlberry-research.git"}
 rlberry-scool = {git = "https://github.com/rlberry-py/rlberry-scool.git"}
+sphinxcontrib-video = {git = "https://github.com/sphinx-contrib/video", optional=true}
+sphinx = {version="6.2.1", optional=true}
+sphinx-gallery = { version= "^0.14.0", optional=true}
+sphinx-math-dollar = {version="^1.2.1", optional=true}
+numpydoc = {version="^1.6.0", optional=true}
+myst-parser = {version="^2.0.0", optional=true}
 
 
 [build-system]