diff --git a/.drone.yml b/.drone.yml
index 29f9534..1b3399d 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -1,5 +1,8 @@
 pipeline:
 
+  concurrency:
+    limit: 9
+
   build-ubuntu-18:
     group: build
     image: plugins/docker