diff --git a/Gemfile.lock b/Gemfile.lock
index 0d0c05c..91201a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -264,7 +264,7 @@ GEM
     multi_json (1.14.1)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    mustermann (1.1.1)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     mysql2 (0.5.3)
     nenv (0.3.0)
@@ -317,12 +317,12 @@ GEM
     public_suffix (4.0.4)
     puma (4.3.3)
       nio4r (~> 2.0)
-    rack (2.2.2)
+    rack (2.2.4)
     rack-attack (6.3.0)
       rack (>= 1.0, < 3)
     rack-mini-profiler (2.0.1)
       rack (>= 1.2.0)
-    rack-protection (2.0.8.1)
+    rack-protection (3.0.4)
       rack
     rack-proxy (0.6.5)
       rack
@@ -419,7 +419,7 @@ GEM
     ruby-progressbar (1.10.1)
     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 (3.7.4)
@@ -443,10 +443,10 @@ GEM
     sexp_processor (4.14.1)
     shellany (0.0.1)
     simple-random (1.0.3)
-    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)
     slack-notifier (2.3.2)
     socialization (1.2.3)
@@ -471,7 +471,7 @@ GEM
     terminal-notifier-guard (1.7.0)
     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)