diff --git a/Gemfile.lock b/Gemfile.lock
index 2ce90c6..b744dd6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -88,7 +88,7 @@ GEM
     colored2 (3.1.2)
     commander (4.6.0)
       highline (~> 2.0.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     declarative (0.0.20)
     digest-crc (0.6.4)