diff --git a/Gemfile.lock b/Gemfile.lock
index c64feb82d..995ae9da6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -166,7 +166,7 @@ GEM
     cocaine (0.5.8)
       climate_control (>= 0.0.3, < 1.0)
     coderay (1.1.2)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     connection_pool (2.2.2)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)