diff --git a/Gemfile.lock b/Gemfile.lock
index 45d891f..8e25c18 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GEM
       sshkit (>= 1.9.0)
     capistrano-bundler (2.1.0)
       capistrano (~> 3.1)
-    concurrent-ruby (1.2.3)
+    concurrent-ruby (1.3.7)
     ed25519 (1.3.0)
     i18n (1.14.4)
       concurrent-ruby (~> 1.0)