diff --git a/README.md b/README.md
index a76d0e06b..4de166685 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,9 @@ Hugo IRIS Theme
 - [Getting Started](#getting-started)
   - [Get Hugo](#get-hugo)
   - [Initialize New Hugo Project](#initialize-new-hugo-project)
+- [Params](#params)
+  - [Site](#site)
+  - [Post Page Front Matter](#post-page-front-matter)
 - [Customize Theme](#customize-theme)
   - [config](#config)
   - [content](#content)
@@ -119,6 +122,31 @@ hugo server
 
 
 
+## Params
+
+### Site
+
+TBW.
+
+### Post Page Front Matter
+
+```yaml
+title:
+description:
+publishdate: 2020-01-01T01:00:00.000Z
+# draft: true
+eyecatch: images/eyecatch.jpg
+toc: true
+# math: true
+# weight: 1
+twitter:
+  username: piris314
+  hashtags: ["Hugo"]
+canonicalURL:
+```
+
+
+
 ## Customize Theme
 
 TBW.
diff --git a/exampleSite/content/en/posts/github-pages-and-github-actions.md b/exampleSite/content/en/posts/github-pages-and-github-actions.md
index b113a4f32..b305d2250 100644
--- a/exampleSite/content/en/posts/github-pages-and-github-actions.md
+++ b/exampleSite/content/en/posts/github-pages-and-github-actions.md
@@ -11,6 +11,7 @@ toc: true
 twitter:
   username: piris314
   hashtags: ["GitHubActions"]
+canonicalURL: https://github.com/peaceiris/actions-gh-pages
 ---
 
 
diff --git a/exampleSite/content/ja/posts/github-pages-and-github-actions.md b/exampleSite/content/ja/posts/github-pages-and-github-actions.md
index b405a09f5..6d0c33531 100644
--- a/exampleSite/content/ja/posts/github-pages-and-github-actions.md
+++ b/exampleSite/content/ja/posts/github-pages-and-github-actions.md
@@ -11,6 +11,7 @@ toc: true
 twitter:
   username: piris314
   hashtags: ["GitHubActions"]
+canonicalURL: https://github.com/peaceiris/actions-gh-pages
 ---
 
 
diff --git a/layouts/partials/head/general.html b/layouts/partials/head/general.html
index 28e66ec26..b909dbd3b 100644
--- a/layouts/partials/head/general.html
+++ b/layouts/partials/head/general.html
@@ -41,3 +41,7 @@
 
 <!-- Open Graph Protocol (OGP) -->
 {{ partial "head/ogp" . }}
+
+{{ with .Page.Params.canonicalURL }}
+<link rel="canonical" href="{{ . | safeURL }}">
+{{ end }}