diff --git a/Gemfile b/Gemfile
index c08b32ae..868355c2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ gem 'sqlite3'
 gem 'pg'
 gem 'parslet', '1.6.2'
 gem 'rest-client'
-gem 'rack', '~> 2.1.4'
+gem 'rack', '~> 2.2.6'
 gem 'rack-timeout'
 gem 'json'
 gem 'haml'
diff --git a/Gemfile.lock b/Gemfile.lock
index 79afefd7..571b62cd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,7 +31,7 @@ GEM
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    rack (2.1.4.2)
+    rack (2.2.6.4)
     rack-timeout (0.6.0)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
@@ -68,7 +68,7 @@ DEPENDENCIES
   parslet (= 1.6.2)
   pg
   pry
-  rack (~> 2.1.4)
+  rack (~> 2.2.6)
   rack-timeout
   re2!
   rest-client