diff --git a/Gemfile.lock b/Gemfile.lock
index cf47c04..c47aab6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -89,7 +89,8 @@ GEM
     multi_json (1.13.1)
     multi_test (0.1.2)
     multipart-post (2.0.0)
-    mustermann (1.0.2)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nio4r (2.3.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
@@ -107,8 +108,8 @@ GEM
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
     racc (1.4.14)
-    rack (2.0.4)
-    rack-protection (2.0.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
@@ -141,6 +142,7 @@ GEM
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.9.0)
+    ruby2_keywords (0.0.5)
     ruby2ruby (2.4.1)
       ruby_parser (~> 3.1)
       sexp_processor (~> 4.6)
@@ -353,12 +355,12 @@ GEM
     rugged (0.27.0)
     semverse (2.0.0)
     sexp_processor (4.11.0)
-    sinatra (2.0.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.1)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.8)
+    tilt (2.0.11)
     timers (4.0.4)
       hitimes
     tinyconfig (0.1.1)