diff --git a/python/config.py b/python/config.py
index 330dfb1..412e779 100644
--- a/python/config.py
+++ b/python/config.py
@@ -3,7 +3,8 @@
   # org, repo name
   ['crim-ca', 'dlm-extension'],
   ['Terradue', 'stac-extensions-disaster'],
-  ['openrsgis', 'trainingdml-ai-extension']
+  ['openrsgis', 'trainingdml-ai-extension'],
+  ['stacchain', 'merkle-tree']
 ]
 
 # Other extensions that are not on GitHub