diff --git a/build/Gemfile.lock b/build/Gemfile.lock
index 0c1ce14e9..f40a64dd3 100644
--- a/build/Gemfile.lock
+++ b/build/Gemfile.lock
@@ -55,7 +55,7 @@ GEM
     multi_json (1.11.2)
     nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
-    rack (1.6.11)
+    rack (1.6.13)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)