diff --git a/example_app/Gemfile.lock b/example_app/Gemfile.lock
index 0ffbabf..f8a466e 100644
--- a/example_app/Gemfile.lock
+++ b/example_app/Gemfile.lock
@@ -45,7 +45,7 @@ GEM
     mocha (1.3.0)
       metaclass (~> 0.0.1)
     multipart-post (2.1.1)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.11.4)
       mini_portile2 (~> 2.5.0)
@@ -57,10 +57,10 @@ GEM
       method_source (~> 0.9.0)
     public_suffix (4.0.6)
     racc (1.5.2)
-    rack (2.2.3)
+    rack (2.2.4)
     rack-flash3 (1.0.5)
       rack
-    rack-protection (2.0.2)
+    rack-protection (2.2.3)
       rack
     rack-test (0.7.0)
       rack (>= 1.0, < 3)
@@ -70,17 +70,17 @@ GEM
       ffi (>= 0.5.0, < 2)
     rerun (0.11.0)
       listen (~> 3.0)
-    ruby2_keywords (0.0.4)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
-    sinatra (2.0.2)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.2)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     xpath (2.1.0)
       nokogiri (~> 1.3)