diff --git a/Gemfile b/Gemfile
index 9753d9ced3a..c859899de8b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -19,7 +19,7 @@ group :jekyll_plugins do
   gem 'jekyll-toc', '0.17.1'
 end
 
-gem 'sinatra', '2.2.2'
+gem 'sinatra', '3.0.0'
 gem 'nokogiri', '1.13.8'
 
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
diff --git a/Gemfile.lock b/Gemfile.lock
index 65491dff267..54bc27c79f4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -68,7 +68,7 @@ GEM
     mercenary (0.4.0)
     mini_portile2 (2.8.0)
     multi_json (1.15.0)
-    mustermann (2.0.2)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.13.8)
       mini_portile2 (~> 2.8.0)
@@ -80,7 +80,7 @@ GEM
     public_suffix (5.0.0)
     racc (1.6.0)
     rack (2.2.4)
-    rack-protection (2.2.2)
+    rack-protection (3.0.0)
       rack
     rake (13.0.6)
     rb-fsevent (0.11.2)
@@ -97,10 +97,10 @@ GEM
       ffi (~> 1.9)
     sassc (2.1.0-x64-mingw32)
       ffi (~> 1.9)
-    sinatra (2.2.2)
-      mustermann (~> 2.0)
-      rack (~> 2.2)
-      rack-protection (= 2.2.2)
+    sinatra (3.0.0)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.0)
       tilt (~> 2.0)
     stringex (2.8.5)
     terminal-table (2.0.0)
@@ -127,7 +127,7 @@ DEPENDENCIES
   rake (= 13.0.6)
   sass-globbing (= 1.1.5)
   sassc (= 2.1.0)
-  sinatra (= 2.2.2)
+  sinatra (= 3.0.0)
   stringex (= 2.8.5)
   tzinfo (~> 2.0)
   tzinfo-data