diff --git a/Gemfile.lock b/Gemfile.lock
index 2e76cc1..9cad2bd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -143,7 +143,8 @@ GEM
     mono_logger (1.1.0)
     multi_json (1.13.1)
     multi_test (0.1.2)
-    mustermann (1.0.2)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     mysql2 (0.4.10)
     netrc (0.11.0)
     nio4r (2.5.2)
@@ -162,10 +163,10 @@ GEM
     public_suffix (3.0.2)
     puma (4.3.5)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.2.4)
     rack-cors (1.0.5)
       rack (>= 1.6.0)
-    rack-protection (2.0.3)
+    rack-protection (3.0.4)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -252,6 +253,7 @@ GEM
     rubocop-rspec (1.32.0)
       rubocop (>= 0.60.0)
     ruby-progressbar (1.10.0)
+    ruby2_keywords (0.0.5)
     safe_yaml (1.0.4)
     semantic_logger (4.5.0)
       concurrent-ruby (~> 1.0)
@@ -261,10 +263,10 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    sinatra (2.0.3)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.3)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
@@ -278,7 +280,7 @@ GEM
       tins (~> 1.0)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tilt (2.0.8)
+    tilt (2.0.11)
     tins (1.20.2)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)