diff --git a/Gemfile.lock b/Gemfile.lock
index 0d7d9e9f3..701d2684a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,7 +32,7 @@ GEM
       csl (~> 2.0)
       observer (< 1.0)
     colorator (1.1.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     csl (2.2.1)
       forwardable (~> 1.3)
       namae (~> 1.2)