diff --git a/Gemfile b/Gemfile
index 41f8b90..fad8b7f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source "https://rubygems.org"
 
 
-gem "sinatra", "~>1.4.7"
+gem "sinatra", "~>2.2.3"
 gem "sinatra-contrib"
diff --git a/Gemfile.lock b/Gemfile.lock
index fde6214..7d2b2db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,31 +1,31 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    backports (3.15.0)
     multi_json (1.14.1)
-    rack (1.6.12)
-    rack-protection (1.5.5)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    sinatra-contrib (1.4.7)
-      backports (>= 2.0)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
+    sinatra-contrib (2.2.3)
       multi_json
-      rack-protection
-      rack-test
-      sinatra (~> 1.4.0)
-      tilt (>= 1.3, < 3)
-    tilt (2.0.10)
+      mustermann (~> 2.0)
+      rack-protection (= 2.2.3)
+      sinatra (= 2.2.3)
+      tilt (~> 2.0)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  sinatra (~> 1.4.7)
+  sinatra (~> 2.2.3)
   sinatra-contrib
 
 BUNDLED WITH