diff --git a/Gemfile.lock b/Gemfile.lock
index 794074e..ac4c5aa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -82,7 +82,7 @@ GEM
     mini_mime (1.1.0)
     mini_portile2 (2.8.0)
     minitest (5.14.4)
-    mustermann (1.1.1)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.7)
     nokogiri (1.13.6)
@@ -92,7 +92,7 @@ GEM
       racc (~> 1.4)
     racc (1.6.0)
     rack (2.2.6.3)
-    rack-protection (2.2.0)
+    rack-protection (3.0.5)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -129,10 +129,10 @@ GEM
     redis (4.6.0)
     ruby2_keywords (0.0.5)
     rubystats (0.3.0)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
-      rack (~> 2.2)
-      rack-protection (= 2.2.0)
+    sinatra (3.0.5)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.5)
       tilt (~> 2.0)
     split (4.0.1)
       redis (>= 4.2)
@@ -147,7 +147,7 @@ GEM
       sprockets (>= 3.0.0)
     sqlite3 (1.4.2)
     thor (1.1.0)
-    tilt (2.0.10)
+    tilt (2.1.0)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
     websocket-driver (0.7.5)