diff --git a/Gemfile b/Gemfile
index cb6acc8..2de8d2c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -33,7 +33,7 @@ gem 'kramdown'
 gem 'liquid'
 gem 'listen'
 gem 'mercenary'
-gem 'rack', '~> 2.2.4'
+gem 'rack', '~> 2.2.5'
 gem 'railties', '>= 5.2.2.1'
 gem 'rouge'
 gem 'rubocop'
diff --git a/Gemfile.lock b/Gemfile.lock
index 993ebe9..0469abc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -192,7 +192,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (5.0.0)
     racc (1.6.1)
-    rack (2.2.4)
+    rack (2.2.5)
     rack-test (2.0.2)
       rack (>= 1.3)
     rails-dom-testing (2.0.3)
@@ -285,7 +285,7 @@ DEPENDENCIES
   mini_racer (~> 0.6.3)
   minima
   nokogiri (>= 1.10.4)
-  rack (~> 2.2.4)
+  rack (~> 2.2.5)
   railties (>= 5.2.2.1)
   rouge
   rubocop
diff --git a/package.json b/package.json
index 40d2b1b..6318468 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "braces": "^3.0.2",
     "browser-sync": "^2.27.11",
     "child_process": "^1.0.2",
-    "core-js": "^3.26.1",
+    "core-js": "^3.27.0",
     "del": "^6.1.1",
     "fancy-log": "^2.0.0",
     "fstream": "^1.0.12",
diff --git a/yarn.lock b/yarn.lock
index 8fed8ef..ec11c19 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2312,10 +2312,10 @@ core-js-compat@^3.25.1:
   dependencies:
     browserslist "^4.21.3"
 
-core-js@^3.26.1:
-  version "3.26.1"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.26.1.tgz#7a9816dabd9ee846c1c0fe0e8fcad68f3709134e"
-  integrity sha512-21491RRQVzUn0GGM9Z1Jrpr6PNPxPi+Za8OM9q4tksTSnlbXXGKK1nXNg/QvwFYettXvSX6zWKCtHHfjN4puyA==
+core-js@^3.27.0:
+  version "3.27.0"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.27.0.tgz#a343bc614f29d9dcffa7616e65e10f9001cdd332"
+  integrity sha512-wY6cKosevs430KRkHUIsvepDXHGjlXOZO3hYXNyqpD6JvB0X28aXyv0t1Y1vZMwE7SoKmtfa6IASHCPN52FwBQ==
 
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"