diff --git a/Gemfile b/Gemfile
index d0ecb8a..b37ffa7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'sinatra', '~> 1.4.0'
+gem 'sinatra', '~> 2.2.0'
 
 group :test, :development do
   gem 'minitest'
diff --git a/Gemfile.lock b/Gemfile.lock
index 24a7647..db3cf78 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,26 +3,26 @@ GEM
   specs:
     awesome_print (1.9.2)
     cgi (0.3.2)
-    dalli (3.2.1)
-    memcachier (0.0.2)
     minitest (5.15.0)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     nokogiri (1.13.6-x86_64-linux)
       racc (~> 1.4)
     racc (1.6.0)
-    rack (1.6.13)
-    rack-cache (1.13.0)
-      rack (>= 0.4)
-    rack-protection (1.5.5)
+    rack (2.2.3.1)
+    rack-protection (2.2.0)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rexml (3.2.5)
     rss (0.2.9)
       rexml
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
+      mustermann (~> 1.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
+      tilt (~> 2.0)
     tilt (2.0.10)
     webrick (1.7.0)
 
@@ -32,15 +32,12 @@ PLATFORMS
 DEPENDENCIES
   awesome_print
   cgi
-  dalli
-  memcachier
   minitest
   nokogiri
   rack
-  rack-cache
   rack-test
   rss
-  sinatra (~> 1.4.0)
+  sinatra (~> 2.2.0)
   webrick
 
 BUNDLED WITH