diff --git a/README.md b/README.md
index 037caa4..fba81d9 100644
--- a/README.md
+++ b/README.md
@@ -242,3 +242,7 @@ There are some FreshRSS extensions out there, developed by community members.
 ### By [@StathisZ](https://github.com/StathisZ)
 
 * [Mark Feed Read On Badge Click](https://github.com/StathisZ/freshrss-mark-read-on-click): Click a feed's unread-count badge in the sidebar to mark all its articles as read.
+
+### By [@chenhaoc](https://github.com/chenhaoc)
+
+* [Title Dedup](https://github.com/chenhaoc/freshrss-dedup-extension): Mark target feed entries as read when the same title already exists in source feeds.
diff --git a/extensions.json b/extensions.json
index 4f16a76..9f50330 100644
--- a/extensions.json
+++ b/extensions.json
@@ -694,6 +694,17 @@
             "method": "git",
             "directory": "."
         },
+        {
+            "name": "Title Dedup",
+            "author": "hao.chen",
+            "description": "Mark target feed entries as read when their title already exists in source feeds.",
+            "version": "0.1.0",
+            "entrypoint": "TitleDedup",
+            "type": "system",
+            "url": "https://github.com/chenhaoc/freshrss-dedup-extension",
+            "method": "git",
+            "directory": "xExtension-TitleDedup"
+        },
         {
             "name": "Title-Wrap",
             "author": "₣rans de Jonge, Joris Kinable",
diff --git a/repositories.json b/repositories.json
index 9861786..e9ba87f 100644
--- a/repositories.json
+++ b/repositories.json
@@ -133,4 +133,7 @@
 }, {
 	"url": "https://github.com/StathisZ/freshrss-mark-read-on-click",
 	"type": "git"
+}, {
+	"url": "https://github.com/chenhaoc/freshrss-dedup-extension",
+	"type": "git"
 }]