diff --git a/Jenkinsfile b/Jenkinsfile
index d17d2a34..26b984a4 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -28,7 +28,7 @@ pipeline {
   }
 
   environment {
-    ISOLATION_ID = sh(returnStdout: true, script: 'echo $BUILD_TAG | sha256sum | cut -c1-64').trim()
+    ISOLATION_ID = sh(returnStdout: true, script: 'echo $BUILD_TAG | sha256sum | cut -c1-32').trim()
     PROJECT_ID = sh(returnStdout: true, script: 'echo $BUILD_TAG | sha256sum | cut -c1-32').trim()
   }