diff --git a/Gemfile.lock b/Gemfile.lock
index d8fbc3c..b517ba3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,20 +9,22 @@ GEM
   specs:
     foreman (0.84.0)
       thor (~> 0.19.1)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     parallel (1.12.1)
     pg (1.0.0)
-    rack (2.0.7)
-    rack-protection (2.0.2)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
+    ruby2_keywords (0.0.5)
     sequel (5.6.0)
-    sinatra (2.0.2)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.2)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     thor (0.19.4)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby