diff --git a/Gemfile.lock b/Gemfile.lock
index c7d95c3..6375d90 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,7 @@ GEM
     jwt (2.2.1)
     method_source (0.9.2)
     multipart-post (2.1.1)
-    mustermann (1.1.1)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.2)
     parallel (1.19.1)
@@ -41,8 +41,8 @@ GEM
       pry (~> 0.10)
     puma (4.3.1)
       nio4r (~> 2.0)
-    rack (2.1.2)
-    rack-protection (2.0.8.1)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -73,7 +73,7 @@ GEM
     rubocop-github (0.14.0)
       rubocop (~> 0.59)
     ruby-progressbar (1.10.1)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     simplecov (0.17.1)
       docile (~> 1.1)
       json (>= 1.8, < 3)
@@ -82,12 +82,12 @@ GEM
     simplecov-json (0.2)
       json
       simplecov
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     unicode-display_width (1.6.1)
 
 PLATFORMS