diff --git a/.drone.yml b/.drone.yml
index c690ec0..46e90f4 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,6 +3,9 @@ kind: pipeline
 type: docker
 name: test elseware 
 
+concurrency:
+    limit: 1
+
 steps:
 - name: cargo build
   image: rustlang/rust:nightly