diff --git a/Gemfile.lock b/Gemfile.lock
index d2097c40a2d..aa16791e291 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -96,7 +96,7 @@ GEM
     chunky_png (1.4.0)
     coderay (1.1.3)
     colored2 (4.0.0)
-    concurrent-ruby (1.3.1)
+    concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
     cose (1.3.0)
       cbor (~> 0.5.9)