diff --git a/tardis_env3.yml b/tardis_env3.yml
index 27d94f7afa8..1bb2df59eca 100644
--- a/tardis_env3.yml
+++ b/tardis_env3.yml
@@ -43,6 +43,7 @@ dependencies:
 - nbsphinx
 - sphinx_bootstrap_theme
 - sphinxcontrib-bibtex
+- sphinxcontrib-apidoc
 - sphinx_rtd_theme
 - recommonmark