diff --git a/examples/basic/Gemfile.lock b/examples/basic/Gemfile.lock
index 30f2396..ac4a407 100644
--- a/examples/basic/Gemfile.lock
+++ b/examples/basic/Gemfile.lock
@@ -5,27 +5,30 @@ PATH
       json-schema (>= 2.5)
       mustermann (~> 1.0.0.beta2)
       nokogiri (~> 1.6)
-      sinatra (~> 1.4)
+      sinatra (~> 2.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
+    addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
-    json-schema (2.8.1)
-      addressable (>= 2.4)
-    mini_portile2 (2.4.0)
+    json-schema (3.0.0)
+      addressable (>= 2.8)
+    mini_portile2 (2.8.0)
     mustermann (1.0.3)
-    nokogiri (1.10.7)
-      mini_portile2 (~> 2.4.0)
-    public_suffix (4.0.1)
-    rack (1.6.11)
-    rack-protection (1.5.5)
+    nokogiri (1.13.6)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    public_suffix (4.0.7)
+    racc (1.6.0)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
-    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)
     tilt (2.0.10)
 
 PLATFORMS