diff --git a/Gemfile.lock b/Gemfile.lock
index 0d48270be..a1364b102 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,7 +55,7 @@ GEM
     benchmark (0.5.0)
     benchmark-ips (2.15.1)
     bigdecimal (4.1.2)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     csv (3.3.5)
     dbm (1.1.0)