diff --git a/example/Gemfile.lock b/example/Gemfile.lock
index 1e705c2..6d0d946 100644
--- a/example/Gemfile.lock
+++ b/example/Gemfile.lock
@@ -24,22 +24,22 @@ GEM
     jmespath (1.4.0)
     kgio (2.11.2)
     method_source (0.9.2)
-    mustermann (1.1.1)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (2.2.3)
-    rack-protection (2.2.0)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
     raindrops (0.19.0)
     ruby2_keywords (0.0.5)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
-      rack (~> 2.2)
-      rack-protection (= 2.2.0)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     unicorn (5.4.1)
       kgio (~> 2.6)
       raindrops (~> 0.7)