diff --git a/docs/conf.py b/docs/conf.py
index d1cd8dba..6826697d 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -56,6 +56,7 @@
     "nitransforms",
     "numpy",
     "pandas",
+    "scipy",
     "seaborn",
     "skimage",
     "sklearn",