diff --git a/examples/sinatra/Gemfile.lock b/examples/sinatra/Gemfile.lock
index 602e8c3..5e1f8d9 100644
--- a/examples/sinatra/Gemfile.lock
+++ b/examples/sinatra/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
     multi_json (1.14.1)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.8)
     oauth2 (1.4.4)
@@ -29,19 +29,19 @@ GEM
     puma (5.6.4)
       nio4r (~> 2.0)
     rack (2.2.4)
-    rack-protection (2.2.0)
+    rack-protection (2.2.3)
       rack
     ruby2_keywords (0.0.5)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.2.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     slim (4.0.1)
       temple (>= 0.7.6, < 0.9)
       tilt (>= 2.0.6, < 2.1)
     temple (0.8.2)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby