diff --git a/Gemfile.lock b/Gemfile.lock
index d54abcd..7e56c87 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,31 +1,31 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    backports (3.15.0)
     commander (4.4.7)
       highline (~> 2.0.0)
     highline (2.0.2)
     json (2.2.0)
-    multi_json (1.13.1)
-    mustermann (1.0.3)
-    rack (2.0.7)
-    rack-protection (2.0.5)
+    multi_json (1.15.0)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
-    sinatra (2.0.5)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+    ruby2_keywords (0.0.5)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
-    sinatra-contrib (2.0.5)
-      backports (>= 2.8.2)
+    sinatra-contrib (3.0.4)
       multi_json
-      mustermann (~> 1.0)
-      rack-protection (= 2.0.5)
-      sinatra (= 2.0.5)
-      tilt (>= 1.3, < 3)
+      mustermann (~> 3.0)
+      rack-protection (= 3.0.4)
+      sinatra (= 3.0.4)
+      tilt (~> 2.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    tilt (2.0.9)
+    tilt (2.0.11)
     unicode-display_width (1.6.0)
     venice (0.5.0)
       commander (~> 4.1)