diff --git a/Gemfile.lock b/Gemfile.lock
index acab6ddc..6a4cd530 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,6 +76,8 @@ GEM
     minitest (5.10.1)
     molinillo (0.5.7)
     multi_json (1.12.1)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nanaimo (0.2.3)
     nap (1.1.0)
     netrc (0.7.8)
@@ -84,8 +86,8 @@ GEM
       multi_json (~> 1.0)
       pusher-signature (~> 0.1.8)
     pusher-signature (0.1.8)
-    rack (1.6.12)
-    rack-protection (1.5.5)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rake (11.2.2)
     rest-client (1.8.0)
@@ -93,10 +95,12 @@ GEM
       mime-types (>= 1.16, < 3.0)
       netrc (~> 0.7)
     ruby-macho (0.2.6)
-    sinatra (1.4.7)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
     state_machine (1.1.2)
     systemu (2.6.5)
     thin (1.7.0)
@@ -104,7 +108,7 @@ GEM
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
     thread_safe (0.3.6)
-    tilt (2.0.5)
+    tilt (2.0.11)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
     unf (0.1.4)