diff --git a/Gemfile b/Gemfile
index 38052e9..60d4c3e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -33,7 +33,7 @@ gem 'kramdown'
 gem 'liquid'
 gem 'listen'
 gem 'mercenary'
-gem 'rack', '~> 3.1.5'
+gem 'rack', '~> 3.1.7'
 gem 'railties', '>= 5.2.2.1'
 gem 'rouge'
 gem 'rubocop'
diff --git a/Gemfile.lock b/Gemfile.lock
index 1b7cdd2..ce14fa3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -220,7 +220,7 @@ GEM
       stringio
     public_suffix (5.0.5)
     racc (1.8.1)
-    rack (3.1.5)
+    rack (3.1.7)
     rack-session (2.0.0)
       rack (>= 3.0.0)
     rack-test (2.1.0)
@@ -334,7 +334,7 @@ DEPENDENCIES
   mini_racer (~> 0.13.0)
   minima!
   nokogiri (>= 1.10.4)
-  rack (~> 3.1.5)
+  rack (~> 3.1.7)
   railties (>= 5.2.2.1)
   rouge
   rubocop