diff --git a/Gemfile.lock b/Gemfile.lock
index 9057d92..0db2b88 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -243,7 +243,7 @@ GEM
     msgpack (1.3.3)
     multi_json (1.14.1)
     multi_xml (0.6.0)
-    mustermann (1.1.1)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     net-scp (3.0.0)
       net-ssh (>= 2.6.5, < 7.0.0)
@@ -265,8 +265,8 @@ GEM
     public_suffix (4.0.5)
     puma (4.3.3)
       nio4r (~> 2.0)
-    rack (2.2.2)
-    rack-protection (2.0.8.1)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
     rack-proxy (0.6.5)
       rack
@@ -316,7 +316,7 @@ GEM
       railties (>= 5.0)
     ruby-vips (2.0.17)
       ffi (~> 1.9)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     rubyzip (2.3.0)
     sass-rails (6.0.0)
@@ -337,10 +337,10 @@ GEM
       connection_pool (~> 2.2, >= 2.2.0)
       redis (~> 3.2, >= 3.2.1)
       sinatra (>= 1.4.7)
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     sixarm_ruby_unaccent (1.2.0)
     sort_alphabetical (1.1.0)
@@ -361,7 +361,7 @@ GEM
       net-ssh (>= 2.8.0)
     thor (1.0.1)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)