diff --git a/_config.yml b/_config.yml
index 8f3a3c4..397c9a2 100644
--- a/_config.yml
+++ b/_config.yml
@@ -10,7 +10,7 @@ execute:
   execute_notebooks: 'off'
 
 repository:
-  url: https://github.com/AllenDowney/AstronomyDataPython
+  url: https://github.com/AllenDowney/AstronomicalData
 html:
   use_repository_button: true