diff --git a/Gemfile b/Gemfile
index 31a4bcf..3037b19 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,4 +18,4 @@ group :development do
   gem 'jekyll-paginate'
 end
 
-gem 'sinatra', '~> 1.4.2'
+gem 'sinatra', '~> 2.2.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 2ba3db5..ce98e5d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,6 +58,8 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
     multipart-post (2.1.1)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     octokit (4.18.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
@@ -72,8 +74,8 @@ GEM
     pygments.rb (0.6.3)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.2.0)
-    rack (1.6.13)
-    rack-protection (1.5.5)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
     rake (10.5.0)
     rb-fsevent (0.10.3)
@@ -81,6 +83,7 @@ GEM
       ffi (~> 1.0)
     rdiscount (2.2.0.1)
     redcarpet (3.5.0)
+    ruby2_keywords (0.0.5)
     rubypants (0.2.0)
     safe_yaml (1.0.5)
     sass (3.2.19)
@@ -89,10 +92,11 @@ GEM
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    sinatra (2.2.0)
+      mustermann (~> 1.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
+      tilt (~> 2.0)
     stringex (1.4.0)
     tilt (2.0.10)
     toml (0.1.2)
@@ -116,7 +120,7 @@ DEPENDENCIES
   rdiscount (~> 2.0)
   rubypants (~> 0.2.0)
   sass-globbing (~> 1.0.0)
-  sinatra (~> 1.4.2)
+  sinatra (~> 2.2.0)
   stringex (~> 1.4.0)
 
 RUBY VERSION