diff --git a/Gemfile.lock b/Gemfile.lock
index a7ca7c7..54f5147 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,7 +32,7 @@ GEM
     builder (3.2.4)
     climate_control (1.2.0)
     coderay (1.1.3)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.2.3)
     connection_pool (2.4.1)
     deep_merge (1.2.2)
     diff-lcs (1.5.0)