diff --git a/jobs/jjb-validate.yaml b/jobs/jjb-validate.yaml
index 0098b6533..379795428 100644
--- a/jobs/jjb-validate.yaml
+++ b/jobs/jjb-validate.yaml
@@ -2,7 +2,7 @@
 - job:
     name: jjb-validate
     project-type: pipeline
-    concurrent: true
+    concurrent: false
     properties:
       - github:
           url: https://github.com/ceph/ceph-csi