diff --git a/AzurePipelines/Publish.UPM.yml b/AzurePipelines/Publish.UPM.yml
index 16392ea..4f757ea 100644
--- a/AzurePipelines/Publish.UPM.yml
+++ b/AzurePipelines/Publish.UPM.yml
@@ -15,6 +15,8 @@ pool:
 
 steps:
 - task: Npm@1
+# Only update the version on master branch
+  condition: eq(variables['Build.SourceBranch'], 'refs/heads/master') 
   inputs:
     command: 'custom'
     customCommand: --no-git-tag-version version prerelease --preid=$(Build.BuildNumber)