diff --git a/Gemfile.lock b/Gemfile.lock
index 331e4596..a6c5373f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -155,7 +155,7 @@ GEM
       descendants_tracker (~> 0.0.1)
     colored (1.2)
     commonmarker (1.1.3-x86_64-linux)
-    concurrent-ruby (1.2.3)
+    concurrent-ruby (1.3.1)
     connection_pool (2.4.1)
     crass (1.0.6)
     cuprite (0.15)