diff --git a/Gemfile.lock b/Gemfile.lock
index 809da3e..ba1239f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -110,7 +110,8 @@ GEM
     minitest (5.11.3)
     multi_json (1.13.1)
     multi_test (0.1.2)
-    mustermann (1.0.2)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
     nio4r (2.3.1)
     nokogiri (1.8.2)
@@ -131,8 +132,8 @@ GEM
     public_suffix (3.0.2)
     puma (4.3.1)
       nio4r (~> 2.0)
-    rack (2.0.5)
-    rack-protection (2.0.1)
+    rack (2.1.4)
+    rack-protection (2.0.8.1)
       rack
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
@@ -158,6 +159,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
+    ruby2_keywords (0.0.5)
     rubyzip (1.2.1)
     selenium-webdriver (3.11.0)
       childprocess (~> 0.5)
@@ -167,10 +169,10 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    sinatra (2.0.1)
+    sinatra (2.0.8.1)
       mustermann (~> 1.0)
       rack (~> 2.0)
-      rack-protection (= 2.0.1)
+      rack-protection (= 2.0.8.1)
       tilt (~> 2.0)
     sinatra-flash (0.3.0)
       sinatra (>= 1.0.0)
@@ -181,7 +183,7 @@ GEM
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
     thread_safe (0.3.6)
-    tilt (2.0.8)
+    tilt (2.0.10)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     unf (0.1.4)