diff --git a/Gemfile.lock b/Gemfile.lock
index 9b3b1f3..2d47cbd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,10 +38,12 @@ GEM
       metaclass (~> 0.0.1)
     multi_json (1.12.1)
     multi_test (0.1.2)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
     plist (3.1.0)
-    rack (1.6.4)
-    rack-protection (1.5.3)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
     rake (11.1.2)
     rdoc (4.2.2)
@@ -63,15 +65,17 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.4.0)
     rspec-support (3.4.1)
-    sinatra (1.4.7)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
+      mustermann (~> 1.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
+      tilt (~> 2.0)
     thin (1.7.0)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.5)
+    tilt (2.0.10)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.2)