diff --git a/Gemfile b/Gemfile
index 73a2d274..442d1a1b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -71,7 +71,7 @@ gem 'kaminari', '~> 1.1.1'
 
 # Enforce dependency versions to avoid vulnerabilities
 gem 'loofah', '~> 2.2.3'
-gem 'rack', '~> 1.6.11'
+gem 'rack', '~> 1.6.13'
 
 group :development, :test do
   gem 'rb-readline'
diff --git a/Gemfile.lock b/Gemfile.lock
index c4dd930d..9d9f14bc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -190,7 +190,7 @@ GEM
     puma (3.12.0)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
-    rack (1.6.11)
+    rack (1.6.13)
     rack-cors (1.0.2)
     rack-livereload (0.3.17)
       rack
@@ -376,7 +376,7 @@ DEPENDENCIES
   pry-byebug
   puma
   quiet_assets
-  rack (~> 1.6.11)
+  rack (~> 1.6.13)
   rack-cors
   rack-livereload
   rails (= 4.2.11)