diff --git a/Gemfile.lock b/Gemfile.lock
index 915abe5..d29e3cf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
     mime-types-data (3.2018.0812)
     minitest (5.14.4)
     multi_xml (0.6.0)
-    mustermann (1.1.1)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.8)
     pg (1.1.3)
@@ -48,8 +48,8 @@ GEM
       slop (~> 3.4)
     puma (5.6.4)
       nio4r (~> 2.0)
-    rack (2.2.3)
-    rack-protection (2.2.0)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
     rake (13.0.1)
     rspec (2.12.0)
@@ -61,16 +61,16 @@ GEM
       diff-lcs (~> 1.1.3)
     rspec-mocks (2.12.2)
     ruby2_keywords (0.0.5)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
-      rack (~> 2.2)
-      rack-protection (= 2.2.0)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     sinatra-activerecord (2.0.18)
       activerecord (>= 4.1)
       sinatra (>= 1.0)
     slop (3.6.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
     zeitwerk (2.4.2)