diff --git a/plumbing/Gemfile.lock b/plumbing/Gemfile.lock
index 8a07339e..25656fd8 100644
--- a/plumbing/Gemfile.lock
+++ b/plumbing/Gemfile.lock
@@ -30,7 +30,7 @@ GEM
     redis (3.1.0)
     timers (1.1.0)
     trollop (2.0)
-    yajl-ruby (1.2.1)
+    yajl-ruby (1.4.3)
 
 PLATFORMS
   ruby