diff --git a/visual_playground/Gemfile.lock b/visual_playground/Gemfile.lock
index bddbfa0..2e27ce9 100644
--- a/visual_playground/Gemfile.lock
+++ b/visual_playground/Gemfile.lock
@@ -3,23 +3,23 @@ GEM
   specs:
     coderay (1.1.3)
     method_source (1.0.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     pg (1.2.3)
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    rack (2.2.3)
-    rack-protection (2.1.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     sequel (5.38.0)
-    sinatra (2.1.0)
-      mustermann (~> 1.0)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     webrick (1.7.0)
 
 PLATFORMS