diff --git a/Gemfile.lock b/Gemfile.lock
index 8b3b0d3..63b5ccc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -140,7 +140,7 @@ GEM
       xpath (~> 3.2)
     chronic (0.10.2)
     coderay (1.1.3)
-    concurrent-ruby (1.3.4)
+    concurrent-ruby (1.3.5)
     concurrent-ruby-edge (0.7.1)
       concurrent-ruby (~> 1.3)
     connection_pool (2.5.0)