diff --git a/Gemfile b/Gemfile
index 9305444..f4373d2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source :rubygems
 
-gem 'rack', "~> 1.6.11"
+gem 'rack', "~> 2.2.7"
 gem 'sinatra'
 gem 'oauth2'
diff --git a/Gemfile.lock b/Gemfile.lock
index 950fbfc..11847dc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,33 +1,43 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    faraday (0.17.0)
-      multipart-post (>= 1.2, < 3)
-    jwt (2.2.1)
-    multi_json (1.14.1)
+    faraday (2.7.10)
+      faraday-net_http (>= 2.0, < 3.1)
+      ruby2_keywords (>= 0.0.4)
+    faraday-net_http (3.0.2)
+    hashie (5.0.0)
+    jwt (2.7.1)
     multi_xml (0.6.0)
-    multipart-post (2.1.1)
-    oauth2 (1.4.2)
-      faraday (>= 0.8, < 2.0)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
+    oauth2 (2.0.9)
+      faraday (>= 0.17.3, < 3.0)
       jwt (>= 1.0, < 3.0)
-      multi_json (~> 1.3)
       multi_xml (~> 0.5)
-      rack (>= 1.2, < 3)
-    rack (1.6.11)
-    rack-protection (1.5.5)
+      rack (>= 1.2, < 4)
+      snaky_hash (~> 2.0)
+      version_gem (~> 1.1)
+    rack (2.2.7)
+    rack-protection (3.0.6)
       rack
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    tilt (2.0.10)
+    ruby2_keywords (0.0.5)
+    sinatra (3.0.6)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.6)
+      tilt (~> 2.0)
+    snaky_hash (2.0.1)
+      hashie
+      version_gem (~> 1.1, >= 1.1.1)
+    tilt (2.2.0)
+    version_gem (1.1.3)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   oauth2
-  rack (~> 1.6.11)
+  rack (~> 2.2.7)
   sinatra
 
 BUNDLED WITH