diff --git a/idaes_examples/notebooks/_config.yml b/idaes_examples/notebooks/_config.yml
index 1d1a4b5c..1f273dce 100644
--- a/idaes_examples/notebooks/_config.yml
+++ b/idaes_examples/notebooks/_config.yml
@@ -26,6 +26,9 @@ sphinx:
       watertap:
       - https://watertap.readthedocs.io/en/stable/
       - null
+      pyomo:
+      - https://pyomo.readthedocs.io/en/stable/
+      - null
     
   # `path_to_book` should point to the directory containing this file (`_config.yml`)
   path_to_book: idaes_examples/notebooks