diff --git a/Gemfile.lock b/Gemfile.lock
index c3c7b32..6e6d448 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,14 +4,18 @@ GEM
     daemons (1.1.8)
     erubis (2.7.0)
     eventmachine (0.12.10)
-    rack (1.4.1)
-    rack-protection (1.2.0)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
+    ruby2_keywords (0.0.5)
     sequel (3.35.0)
-    sinatra (1.3.2)
-      rack (~> 1.3, >= 1.3.6)
-      rack-protection (~> 1.2)
-      tilt (~> 1.3, >= 1.3.3)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
     sinatra-sequel (0.9.0)
       sequel (>= 3.2.0)
       sinatra (>= 0.9.4)
@@ -20,7 +24,7 @@ GEM
       daemons (>= 1.0.9)
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
-    tilt (1.3.3)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby