diff --git a/Gemfile.lock b/Gemfile.lock
index c3bd97b..14bb45f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,23 +1,29 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    base64 (0.2.0)
     daemons (1.1.9)
     eventmachine (1.0.3)
     foreman (0.62.0)
       thor (>= 0.13.6)
-    rack (1.6.12)
-    rack-protection (1.5.0)
-      rack
-    sinatra (1.4.2)
-      rack (~> 1.5, >= 1.5.2)
-      rack-protection (~> 1.5.5)
-      tilt (~> 1.3, >= 1.3.4)
+    mustermann (3.0.3)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.11)
+    rack-protection (3.2.0)
+      base64 (>= 0.1.0)
+      rack (~> 2.2, >= 2.2.4)
+    ruby2_keywords (0.0.5)
+    sinatra (3.2.0)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.2.0)
+      tilt (~> 2.0)
     thin (1.5.1)
       daemons (>= 1.0.9)
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
     thor (0.18.1)
-    tilt (1.3.6)
+    tilt (2.6.0)
 
 PLATFORMS
   ruby