diff --git a/Gemfile.lock b/Gemfile.lock
index 7b1becd..23cf128 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,12 +1,11 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    backports (3.17.1)
     coderay (1.1.2)
     dotenv (2.7.5)
     method_source (1.0.0)
     mini_portile2 (2.4.0)
-    multi_json (1.14.1)
+    multi_json (1.15.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.10.9)
@@ -14,21 +13,20 @@ GEM
     pry (0.13.0)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    rack (2.2.2)
-    rack-protection (2.0.8.1)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
-    ruby2_keywords (0.0.2)
-    sinatra (2.0.8.1)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
-    sinatra-contrib (2.0.8.1)
-      backports (>= 2.8.2)
+    sinatra-contrib (2.2.0)
       multi_json
       mustermann (~> 1.0)
-      rack-protection (= 2.0.8.1)
-      sinatra (= 2.0.8.1)
+      rack-protection (= 2.2.0)
+      sinatra (= 2.2.0)
       tilt (~> 2.0)
     sinatra-cors (1.1.0)
     tilt (2.0.10)