diff --git a/Gemfile b/Gemfile
index e56f498..de18181 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'http://rubygems.org'
 gem 'aws-sdk-v1', '1.64'
 gem 'fpm', '1.12.0'
-gem 'sinatra', '1.4.6'
+gem 'sinatra', '2.2.3'
 gem 'nokogiri', '1.10.0'
 group :test do
   gem 'rspec'
diff --git a/Gemfile.lock b/Gemfile.lock
index f0cc5b3..eed2591 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,6 +35,8 @@ GEM
     json (1.8.6)
     mini_portile2 (2.4.0)
     mustache (0.99.8)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nokogiri (1.10.0)
       mini_portile2 (~> 2.4.0)
     pleaserun (0.0.32)
@@ -44,8 +46,8 @@ GEM
       insist
       mustache (= 0.99.8)
       stud
-    rack (1.6.13)
-    rack-protection (1.5.5)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rchardet (1.8.0)
     rspec (3.10.0)
@@ -67,13 +69,15 @@ GEM
     ruby-xz (0.2.3)
       ffi (~> 1.9)
       io-like (~> 0.3)
-    sinatra (1.4.6)
-      rack (~> 1.4)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
     sorcerer (2.0.1)
     stud (0.0.23)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   x86_64-linux
@@ -84,7 +88,7 @@ DEPENDENCIES
   nokogiri (= 1.10.0)
   rspec
   rspec-given
-  sinatra (= 1.4.6)
+  sinatra (= 2.2.3)
 
 BUNDLED WITH
    2.2.17
diff --git a/ploy.gemspec b/ploy.gemspec
index fb1ab95..44c24f5 100644
--- a/ploy.gemspec
+++ b/ploy.gemspec
@@ -9,6 +9,6 @@ Gem::Specification.new do |s|
   s.files += Dir['lib/**/*.rb']
   s.add_runtime_dependency 'aws-sdk-v1', '1.64'
   s.add_runtime_dependency 'fpm', '1.12.0'
-  s.add_runtime_dependency 'sinatra', '1.4.6'
+  s.add_runtime_dependency 'sinatra', '2.2.3'
   s.executables << 'ploy'
 end