diff --git a/pyproject.toml b/pyproject.toml
index c5a4af15..2cc98cff 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,7 +46,9 @@ sphinx_bootstrap_theme = "^0.8.1"
 sphinx-autoapi = "^2.1.1"
 sphinx-copybutton= "^0.5.2"
 myst-parser = "^2.0.0"
-sphinx-notfound-page = "*"
+sphinx-notfound-page = "^0.8.3"
+seed_intersphinx_mapping = "^1.2.1"
+
 
 [tool.pytest.ini_options]
 pythonpath = "."