diff --git a/Gemfile.lock b/Gemfile.lock
index ac3a42e19f4..0b551d72269 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
     chunky_png (1.4.0)
     coderay (1.1.3)
     colored2 (4.0.0)
-    concurrent-ruby (1.3.3)
+    concurrent-ruby (1.3.4)
     connection_pool (2.4.1)
     cose (1.3.0)
       cbor (~> 0.5.9)