diff --git a/doc/conf.py b/doc/conf.py
index 0f5e48ea..e897fd7e 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -43,7 +43,7 @@ def setup(app):
 # This should include all modules used in tobac. These are dummy imports,
 # but should include both required and optional dependencies.
 autodoc_mock_imports = [
-    "numpy",
+#    "numpy",
     "scipy",
     "scikit-image",
     "pandas",
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 82f69f75..6ba789a0 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,2 +1,3 @@
 ipykernel
 nbsphinx
+numpy