diff --git a/Gemfile.lock b/Gemfile.lock
index 29f410bdec..80c733d202 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -159,7 +159,7 @@ GEM
     climate_control (1.2.0)
     cocoon (1.2.15)
     color_diff (0.1)
-    concurrent-ruby (1.3.4)
+    concurrent-ruby (1.3.5)
     connection_pool (2.5.0)
     cose (1.3.1)
       cbor (~> 0.5.9)