diff --git a/Gemfile.lock b/Gemfile.lock
index 3f85fa958bd..b869c9923a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -139,9 +139,9 @@ GEM
     concord (0.1.5)
       adamantium (~> 0.2.0)
       equalizer (~> 0.0.9)
-    concurrent-ruby (1.1.3)
-    concurrent-ruby-ext (1.1.3)
-      concurrent-ruby (= 1.1.3)
+    concurrent-ruby (1.1.5)
+    concurrent-ruby-ext (1.1.5)
+      concurrent-ruby (= 1.1.5)
     connection_pool (2.2.2)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)