diff --git a/_javascript/copyright b/_javascript/copyright
index a76b828..d7c8de7 100644
--- a/_javascript/copyright
+++ b/_javascript/copyright
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v3.3.2 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/_sass/jekyll-theme-chirpy.scss b/_sass/jekyll-theme-chirpy.scss
index 037936f..2fd486c 100644
--- a/_sass/jekyll-theme-chirpy.scss
+++ b/_sass/jekyll-theme-chirpy.scss
@@ -1,7 +1,7 @@
 /*!
  * The styles for Jekyll theme Chirpy
  *
- * Chirpy v3.3.2 (https://github.com/cotes2020/jekyll-theme-chirpy)
+ * Chirpy v4.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/categories.min.js b/assets/js/dist/categories.min.js
index 850237f..711a7ad 100644
--- a/assets/js/dist/categories.min.js
+++ b/assets/js/dist/categories.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v3.3.2 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/commons.min.js b/assets/js/dist/commons.min.js
index 06cb284..aa67253 100644
--- a/assets/js/dist/commons.min.js
+++ b/assets/js/dist/commons.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v3.3.2 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/home.min.js b/assets/js/dist/home.min.js
index 14bba3e..cc3cc0e 100644
--- a/assets/js/dist/home.min.js
+++ b/assets/js/dist/home.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v3.3.2 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/page.min.js b/assets/js/dist/page.min.js
index d36063f..e07141a 100644
--- a/assets/js/dist/page.min.js
+++ b/assets/js/dist/page.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v3.3.2 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/post.min.js b/assets/js/dist/post.min.js
index e626684..8b8bb21 100644
--- a/assets/js/dist/post.min.js
+++ b/assets/js/dist/post.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v3.3.2 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/assets/js/dist/pvreport.min.js b/assets/js/dist/pvreport.min.js
index cde699c..8c54d9c 100644
--- a/assets/js/dist/pvreport.min.js
+++ b/assets/js/dist/pvreport.min.js
@@ -1,5 +1,5 @@
 /*!
- * Chirpy v3.3.2 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v4.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
diff --git a/jekyll-theme-chirpy.gemspec b/jekyll-theme-chirpy.gemspec
index 6b1add4..f86b366 100644
--- a/jekyll-theme-chirpy.gemspec
+++ b/jekyll-theme-chirpy.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name          = "jekyll-theme-chirpy"
-  spec.version       = "3.3.2"
+  spec.version       = "4.0.0"
   spec.authors       = ["Cotes Chung"]
   spec.email         = ["cotes.chung@gmail.com"]
 
diff --git a/package.json b/package.json
index a3d5ef3..e02317c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jekyll-theme-chirpy",
-  "version": "3.3.2",
+  "version": "4.0.0",
   "description": "A minimal, sidebar, responsive web design Jekyll theme that focuses on text presentation.",
   "main": "index.js",
   "directories": {