diff --git a/Gemfile.lock b/Gemfile.lock
index 6f47c77..6b6a848 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -158,7 +158,8 @@ GEM
     multi_json (1.13.1)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nio4r (2.5.1)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
@@ -188,9 +189,9 @@ GEM
       pry (>= 0.10.4)
     public_suffix (4.0.1)
     puma (3.12.1)
-    rack (2.0.7)
+    rack (2.2.4)
     rack-cors (1.0.3)
-    rack-protection (2.0.7)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -247,6 +248,7 @@ GEM
       rspec-mocks (~> 3.8.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -268,10 +270,10 @@ GEM
       sprockets-rails
       tilt
     selectize-rails (0.12.6)
-    sinatra (2.0.7)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.7)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     spring (2.1.0)
     spring-watcher-listen (2.0.1)
@@ -286,7 +288,7 @@ GEM
       sprockets (>= 3.0.0)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     uglifier (4.1.20)