diff --git a/Gemfile.lock b/Gemfile.lock
index c907335..8936e96 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,8 @@ GEM
   specs:
     dotenv (2.5.0)
     hashie (3.6.0)
-    mustermann (1.0.3)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     oauth (0.5.4)
     omniauth (1.9.0)
       hashie (>= 3.4.6, < 3.7.0)
@@ -14,15 +15,16 @@ GEM
     omniauth-twitter (1.4.0)
       omniauth-oauth (~> 1.1)
       rack
-    rack (2.0.6)
-    rack-protection (2.0.5)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
-    sinatra (2.0.5)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+    ruby2_keywords (0.0.5)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
-    tilt (2.0.9)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby