diff --git a/features/support/launch.rb b/features/support/launch.rb
index c71a347c6..0f983c151 100644
--- a/features/support/launch.rb
+++ b/features/support/launch.rb
@@ -1,5 +1,6 @@
 require 'socket'
 require 'open3'
+require 'json'
 
 # Only one isntance of osrm-routed is ever launched, to avoid collisions.
 # The default is to keep osrm-routed running and load data with datastore.