diff --git a/Gemfile.lock b/Gemfile.lock
index 56acaac7..bdaa2645 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,7 +15,6 @@ GEM
       zeitwerk (~> 2.3)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
-    backports (3.18.1)
     builder (3.2.4)
     concurrent-ruby (1.1.7)
     cookiejar (0.3.3)
@@ -81,7 +80,7 @@ GEM
     public_suffix (4.0.5)
     racc (1.5.2)
     rack (2.2.3)
-    rack-protection (2.0.8.1)
+    rack-protection (2.1.0)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -103,24 +102,23 @@ GEM
     rexml (3.2.5)
     ruby-debug-ide (0.7.2)
       rake (>= 0.8.1)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.4)
     rubygems-update (3.1.4)
     simplecov (0.16.1)
       docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    sinatra (2.0.8.1)
+    sinatra (2.1.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+      rack (~> 2.2)
+      rack-protection (= 2.1.0)
       tilt (~> 2.0)
-    sinatra-contrib (2.0.8.1)
-      backports (>= 2.8.2)
+    sinatra-contrib (2.1.0)
       multi_json
       mustermann (~> 1.0)
-      rack-protection (= 2.0.8.1)
-      sinatra (= 2.0.8.1)
+      rack-protection (= 2.1.0)
+      sinatra (= 2.1.0)
       tilt (~> 2.0)
     sync (0.5.0)
     term-ansicolor (1.7.1)
@@ -166,4 +164,4 @@ DEPENDENCIES
   rubygems-update
   sinatra
   sinatra-contrib
-  unicorn
\ No newline at end of file
+  unicorn