diff --git a/Gemfile.lock b/Gemfile.lock
index 03314fa408..25b35178e7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
       html-pipeline (~> 2.0)
       nokogiri (~> 1.6.4)
     parallel (1.6.2)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     rack-ssl-enforcer (0.2.9)
diff --git a/vendor/cache/rack-1.6.13.gem b/vendor/cache/rack-1.6.13.gem
new file mode 100644
index 0000000000..cea335cb8f
Binary files /dev/null and b/vendor/cache/rack-1.6.13.gem differ
diff --git a/vendor/cache/rack-1.6.4.gem b/vendor/cache/rack-1.6.4.gem
deleted file mode 100644
index 6d06fed8e7..0000000000
Binary files a/vendor/cache/rack-1.6.4.gem and /dev/null differ