diff --git a/Gemfile.lock b/Gemfile.lock
index 337429e..cec8641 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,11 +43,12 @@ GEM
     minitest (5.11.3)
     multi_json (1.13.1)
     multipart-post (2.0.0)
-    mustermann (1.0.3)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     os (1.0.0)
     public_suffix (3.0.3)
-    rack (2.0.6)
-    rack-protection (2.0.5)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
     rake (10.5.0)
     representable (2.3.0)
@@ -66,19 +67,20 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
+    ruby2_keywords (0.0.5)
     signet (0.11.0)
       addressable (~> 2.3)
       faraday (~> 0.9)
       jwt (>= 1.5, < 3.0)
       multi_json (~> 1.10)
-    sinatra (2.0.5)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tilt (2.0.9)
+    tilt (2.0.10)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     uber (0.0.15)