diff --git a/.yamato/com.unity.ml-agents-publish.yml b/.yamato/com.unity.ml-agents-publish.yml
index 69774c7200..aa8ddc8aac 100644
--- a/.yamato/com.unity.ml-agents-publish.yml
+++ b/.yamato/com.unity.ml-agents-publish.yml
@@ -10,6 +10,7 @@ publish:
     - npm install upm-ci-utils@stable -g --registry https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-npm
     - upm-ci package publish --package-path com.unity.ml-agents
   triggers:
+    expression: NOT push.branch eq "master"
     cancel_old_ci: true
 #    tags:
 #      only: