diff --git a/Gemfile.lock b/Gemfile.lock
index d7b83dfb5ee..53d3fd3cbc6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -106,7 +106,7 @@ GEM
     chunky_png (1.4.0)
     coderay (1.1.3)
     colored2 (4.0.0)
-    concurrent-ruby (1.3.4)
+    concurrent-ruby (1.3.5)
     connection_pool (2.5.0)
     cose (1.3.1)
       cbor (~> 0.5.9)