diff --git a/Gemfile.lock b/Gemfile.lock
index dcfffe5..f92e200 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,7 +50,7 @@ GEM
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
     colorator (1.1.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)