diff --git a/config.yml b/config.yml
index 98975e4..0d8840a 100644
--- a/config.yml
+++ b/config.yml
@@ -4,7 +4,7 @@ log:
 runner:
   file: .runner
   # Execute how many tasks concurrently at the same time.
-  capacity: 1
+  capacity: 3
   # Extra environment variables to run jobs.
   envs:
     CI: 1