diff --git a/Gemfile.lock b/Gemfile.lock
index c7e8426..e8b869d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
     docile (1.3.2)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
@@ -27,7 +27,7 @@ GEM
     pg (1.2.3)
     public_suffix (4.0.5)
     rack (2.2.3)
-    rack-protection (2.0.8.1)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -59,7 +59,7 @@ GEM
     rubocop-ast (0.1.0)
       parser (>= 2.7.0.1)
     ruby-progressbar (1.10.1)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     simplecov (0.18.5)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
@@ -68,10 +68,10 @@ GEM
       simplecov
       terminal-table
     simplecov-html (0.12.2)
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     sinatra-css (0.1.5)
       sinatra (>= 1.0)
@@ -83,7 +83,7 @@ GEM
       sinatra-outputbuffer (>= 0.1.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    tilt (2.0.10)
+    tilt (2.0.11)
     unicode-display_width (1.7.0)
     xpath (3.2.0)
       nokogiri (~> 1.8)