diff --git a/Gemfile b/Gemfile
index e1fa994..e76195e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source "http://rubygems.org"
 
 gem "hominid", "~> 3.0.5"
-gem "sinatra", "~> 1.3.4"
+gem "sinatra", "~> 2.0.0"
 
 # Google Analytics: UNCOMMENT IF DESIRED, THEN ADD YOUR OWN ACCOUNT INFO TO config.ru
 #gem 'rack-google-analytics', "~> 0.9.2"
diff --git a/Gemfile.lock b/Gemfile.lock
index 6b53a91..8f0f5d5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,18 +2,25 @@ GEM
   remote: http://rubygems.org/
   specs:
     hominid (3.0.5)
-    rack (1.5.2)
-    rack-protection (1.3.2)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.3)
+    rack-protection (2.0.8.1)
       rack
-    sinatra (1.3.4)
-      rack (~> 1.4)
-      rack-protection (~> 1.3)
-      tilt (~> 1.3, >= 1.3.3)
-    tilt (1.3.3)
+    ruby2_keywords (0.0.2)
+    sinatra (2.0.8.1)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.8.1)
+      tilt (~> 2.0)
+    tilt (2.0.10)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   hominid (~> 3.0.5)
-  sinatra (~> 1.3.4)
+  sinatra (~> 2.0.0)
+
+BUNDLED WITH
+   1.17.3