diff --git a/Gemfile.lock b/Gemfile.lock
index c7cc314..8769e4d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,7 +37,7 @@ GEM
       smart_properties
     bigdecimal (4.1.0)
     builder (3.3.0)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.0)
     crass (1.0.6)
     drb (2.2.1)