diff --git a/Gemfile.lock b/Gemfile.lock
index 4943078..08b7fa7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -80,15 +80,16 @@ GEM
     minitest (5.11.3)
     mocha (1.4.0)
       metaclass (~> 0.0.1)
-    mustermann (1.0.2)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (2.0.4)
-    rack-protection (2.0.1)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
     rack-test (0.8.3)
       rack (>= 1.0, < 3)
@@ -108,6 +109,7 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
+    ruby2_keywords (0.0.5)
     sham (2.0.0)
     shoulda (3.5.0)
       shoulda-context (~> 1.0, >= 1.0.1)
@@ -115,10 +117,10 @@ GEM
     shoulda-context (1.2.2)
     shoulda-matchers (2.8.0)
       activesupport (>= 3.0.0)
-    sinatra (2.0.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.1)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     sqlite3 (1.3.13)
     thin (1.7.2)
@@ -127,7 +129,7 @@ GEM
       rack (>= 1, < 3)
     thor (0.20.0)
     thread_safe (0.3.6)
-    tilt (2.0.8)
+    tilt (2.0.11)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     unf (0.1.4)