diff --git a/Gemfile.lock b/Gemfile.lock
index 5ac821f6391..971ce1d6612 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,7 @@ GEM
     coderay (1.1.3)
     commander (5.0.0)
       highline (~> 3.0.0)
-    concurrent-ruby (1.3.7)
+    concurrent-ruby (1.3.8)
     connection_pool (3.0.2)
     crack (1.0.1)
       bigdecimal