diff --git a/Gemfile.lock b/Gemfile.lock
index 5264b65..c563dd0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     byebug (11.0.1)
     coderay (1.1.2)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.3.7)
     diff-lcs (1.3)
     faker (2.4.0)
       i18n (~> 1.6.0)