diff --git a/Gemfile.lock b/Gemfile.lock
index f2cd8f9..0e54c01 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,6 +31,8 @@ GEM
     multi_json (1.12.1)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     oauth2 (1.1.0)
       faraday (>= 0.8, < 0.10)
       jwt (~> 1.0, < 1.5.2)
@@ -48,14 +50,16 @@ GEM
     omniauth-oauth2 (1.4.0)
       oauth2 (~> 1.0)
       omniauth (~> 1.2)
-    rack (1.6.13)
-    rack-protection (1.5.5)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
     redis (3.3.0)
-    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)
     sucker_punch (1.6.0)
       celluloid (~> 0.17.2)
     temple (0.8.2)