diff --git a/Gemfile.lock b/Gemfile.lock
index f60e8e561a6..7d3febec563 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -84,7 +84,7 @@ GEM
     chunky_png (1.4.0)
     coderay (1.1.3)
     colored2 (3.1.2)
-    concurrent-ruby (1.1.7)
+    concurrent-ruby (1.1.8)
     connection_pool (2.2.3)
     cose (1.2.0)
       cbor (~> 0.5.9)