diff --git a/Gemfile.lock b/Gemfile.lock
index ac24ce4..979372e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
     ast (2.4.3)
     base64 (0.3.0)
     bigdecimal (4.1.2)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     drb (2.2.3)
     i18n (1.14.8)