diff --git a/python3-ecosystem.yaml b/python3-ecosystem.yaml
index 443d7b1..ee64189 100644
--- a/python3-ecosystem.yaml
+++ b/python3-ecosystem.yaml
@@ -26,6 +26,7 @@ data:
         requires:
             platform: master
             python3: 3.6
+            libtom: master
     references:
         community: https://www.python.org/
         documentation: https://docs.python.org/3/