diff --git a/example/Gemfile.lock b/example/Gemfile.lock
index 1025d0f..49b7dc0 100644
--- a/example/Gemfile.lock
+++ b/example/Gemfile.lock
@@ -6,7 +6,6 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    backports (3.6.4)
     coderay (1.1.0)
     concurrent-ruby (1.1.5)
     fuzzy_match (2.1.0)
@@ -16,32 +15,33 @@ GEM
       concurrent-ruby (~> 1.0)
     method_source (0.8.2)
     minitest (5.11.3)
-    multi_json (1.11.1)
+    multi_json (1.15.0)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     pry (0.10.1)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (1.6.11)
-    rack-protection (1.5.5)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
-    rack-test (0.6.3)
-      rack (>= 1.0)
+    ruby2_keywords (0.0.5)
     shotgun (0.9.1)
       rack (>= 1.0)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    sinatra-contrib (1.4.6)
-      backports (>= 2.0)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
+      tilt (~> 2.0)
+    sinatra-contrib (3.0.4)
       multi_json
-      rack-protection
-      rack-test
-      sinatra (~> 1.4.0)
-      tilt (>= 1.3, < 3)
+      mustermann (~> 3.0)
+      rack-protection (= 3.0.4)
+      sinatra (= 3.0.4)
+      tilt (~> 2.0)
     slop (3.6.0)
     thread_safe (0.3.6)
-    tilt (2.0.9)
+    tilt (2.0.11)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)