diff --git a/Gemfile.lock b/Gemfile.lock
index 3ab0fb3..1104d7c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,8 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     multi_json (1.13.1)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nio4r (2.3.1)
     nokogiri (1.9.1)
       mini_portile2 (~> 2.4.0)
@@ -143,8 +144,8 @@ GEM
     pg (0.21.0)
     public_suffix (3.0.3)
     puma (3.12.0)
-    rack (2.0.6)
-    rack-protection (2.0.4)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -206,6 +207,7 @@ GEM
       rspec-mocks (~> 3.8.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
+    ruby2_keywords (0.0.5)
     ruby_http_client (3.3.0)
     ruby_parser (3.12.0)
       sexp_processor (~> 4.9)
@@ -228,10 +230,10 @@ GEM
       ruby_http_client (~> 3.3.0)
       sinatra (>= 1.4.7, < 3)
     sexp_processor (4.11.0)
-    sinatra (2.0.4)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.4)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     spring (2.0.2)
       activesupport (>= 4.2)
@@ -248,7 +250,7 @@ GEM
     temple (0.8.0)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tilt (2.0.9)
+    tilt (2.0.11)
     turbolinks (5.2.0)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)