diff --git a/pystac/__init__.py b/pystac/__init__.py
index cb0eb3818..be4056802 100644
--- a/pystac/__init__.py
+++ b/pystac/__init__.py
@@ -34,6 +34,7 @@ class STACError(Exception):
 import pystac.extensions.label
 import pystac.extensions.pointcloud
 import pystac.extensions.projection
+import pystac.extensions.scientific
 import pystac.extensions.single_file_stac
 import pystac.extensions.timestamps
 import pystac.extensions.version