diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9fae2e0..b1b5fe4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- add github-release-notifier formatter
+  in [#93](https://github.com/nim65s/matrix-webhook/pull/93)
+  by [@nrekretep](https://github.com/nrekretep)
+
 ## [v3.8.0] - 2023-04-08
 
 - add a healthcheck for load balancers
diff --git a/README.md b/README.md
index 59bc724..79b19a5 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,10 @@ Add a Google Chat integration with an URL ending with `?formatter=gitlab_gchat&k
 
 Add a Microsoft Teams integration with an URL ending with `?formatter=gitlab_teams&key=API_KEY`
 
+#### Github Release Notifier
+
+To receiver notifications about new releases of projects hosted at github.com you can add a matrix webhook ending with `?formatter=grn&key=API_KEY` to [Github Release Notifier (grn)](https://github.com/femtopixel/github-release-notifier).
+
 ## Test room
 
 [#matrix-webhook:tetaneutral.net](https://matrix.to/#/!DPrUlnwOhBEfYwsDLh:matrix.org)
diff --git a/matrix_webhook/formatters.py b/matrix_webhook/formatters.py
index 9ed5a01..8ca321b 100644
--- a/matrix_webhook/formatters.py
+++ b/matrix_webhook/formatters.py
@@ -71,3 +71,17 @@ def gitlab_teams(data, headers):
 
     data["body"] = "  \n".join(body)
     return data
+
+
+def grn(data, headers):
+    """Pretty-print a github release notifier (grn) notification."""
+    version, title, author, package = (
+        data[k] for k in ["version", "title", "author", "package_name"]
+    )
+    data["body"] = (
+        f"### {package} - {version}\n\n{title}\n\n"
+        f"[{author} released new version **{version}** for **{package}**]"
+        f"(https://github.com/{package}/releases/tag/{version}).\n\n"
+    )
+
+    return data
diff --git a/tests/example_grn.json b/tests/example_grn.json
new file mode 100644
index 0000000..eb9bc65
--- /dev/null
+++ b/tests/example_grn.json
@@ -0,0 +1,9 @@
+{
+    "date": [2017, 11, 13, 19, 46, 35, 0, 317, 0],
+    "version": "0.7.2",
+    "title": "Fixes split modules",
+    "content": "",
+    "media": "https://avatars0.githubusercontent.com/u/14236493?s=60&v=4",
+    "author": "jaymoulin",
+    "package_name": "jaymoulin/google-music-manager"
+}
diff --git a/tests/test_grn.py b/tests/test_grn.py
new file mode 100644
index 0000000..d69ce59
--- /dev/null
+++ b/tests/test_grn.py
@@ -0,0 +1,44 @@
+"""Test module for Github Release Notifier (grn) formatter.
+
+ref https://github.com/femtopixel/github-release-notifier
+"""
+
+import unittest
+from pathlib import Path
+
+import httpx
+import nio
+
+from .start import BOT_URL, FULL_ID, KEY, MATRIX_ID, MATRIX_PW, MATRIX_URL
+
+
+class GithubReleaseNotifierFormatterTest(unittest.IsolatedAsyncioTestCase):
+    """GRN formatter test class."""
+
+    async def test_grn_body(self):
+        """Send a markdown message, and check the result."""
+        messages = []
+        client = nio.AsyncClient(MATRIX_URL, MATRIX_ID)
+
+        await client.login(MATRIX_PW)
+        room = await client.room_create()
+
+        with Path("tests/example_grn.json").open() as f:
+            example_grn_request = f.read()
+        self.assertEqual(
+            httpx.post(
+                f"{BOT_URL}/{room.room_id}",
+                params={"formatter": "grn", "key": KEY},
+                content=example_grn_request,
+            ).json(),
+            {"status": 200, "ret": "OK"},
+        )
+
+        sync = await client.sync()
+        messages = await client.room_messages(room.room_id, sync.next_batch)
+        await client.close()
+
+        message = messages.chunk[0]
+        self.assertEqual(message.sender, FULL_ID)
+        self.assertIn("Fixes split modules", message.body)
+        self.assertIn("jaymoulin/google-music-manager", message.body)