diff --git a/Gemfile.lock b/Gemfile.lock
index f815403..c94949e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,7 +19,7 @@ GEM
     benchmark (0.5.0)
     bigdecimal (3.1.9)
     colorator (1.1.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     csv (3.3.2)
     drb (2.2.3)