diff --git a/API.md b/API.md
index 440d4f545..f42d0b0cd 100644
--- a/API.md
+++ b/API.md
@@ -377,6 +377,7 @@ Get all available addons.
 {
     "name": "xy bla",
     "description": "description",
+    "long_description": "null|markdown",
     "auto_update": "bool",
     "url": "null|url of addon",
     "detached": "bool",
diff --git a/hassio/addons/addon.py b/hassio/addons/addon.py
index 8e118a12e..076dc82b1 100644
--- a/hassio/addons/addon.py
+++ b/hassio/addons/addon.py
@@ -167,6 +167,19 @@ class Addon(object):
         """Return description of addon."""
         return self._mesh[ATTR_DESCRIPTON]
 
+    @property
+    def long_description(self):
+        """Return README.md as long_description."""
+        readme = Path(self.path_location, 'README.md')
+
+        # If readme not exists
+        if not readme.exists():
+            return None
+
+        # Return data
+        with readme.open('r') as readme_file:
+            return readme_file.read()
+
     @property
     def repository(self):
         """Return repository of addon."""
diff --git a/hassio/api/addons.py b/hassio/api/addons.py
index f5f7232b6..295d133b5 100644
--- a/hassio/api/addons.py
+++ b/hassio/api/addons.py
@@ -14,7 +14,7 @@ from ..const import (
     ATTR_INSTALLED, ATTR_LOGO, ATTR_WEBUI, ATTR_DEVICES, ATTR_PRIVILEGED,
     ATTR_AUDIO, ATTR_AUDIO_INPUT, ATTR_AUDIO_OUTPUT, ATTR_HASSIO_API,
     ATTR_GPIO, ATTR_HOMEASSISTANT_API, ATTR_STDIN, BOOT_AUTO, BOOT_MANUAL,
-    ATTR_CHANGELOG, ATTR_HOST_IPC, ATTR_HOST_DBUS,
+    ATTR_CHANGELOG, ATTR_HOST_IPC, ATTR_HOST_DBUS, ATTR_LONG_DESCRIPTION,
     CONTENT_TYPE_PNG, CONTENT_TYPE_BINARY, CONTENT_TYPE_TEXT)
 from ..validate import DOCKER_PORTS
 
@@ -108,6 +108,7 @@ class APIAddons(object):
         return {
             ATTR_NAME: addon.name,
             ATTR_DESCRIPTON: addon.description,
+            ATTR_LONG_DESCRIPTION: addon.long_description,
             ATTR_VERSION: addon.version_installed,
             ATTR_AUTO_UPDATE: addon.auto_update,
             ATTR_REPOSITORY: addon.repository,
diff --git a/hassio/const.py b/hassio/const.py
index 9907f39ab..c1875acec 100644
--- a/hassio/const.py
+++ b/hassio/const.py
@@ -57,6 +57,7 @@ ATTR_WATCHDOG = 'watchdog'
 ATTR_CHANGELOG = 'changelog'
 ATTR_DATE = 'date'
 ATTR_ARCH = 'arch'
+ATTR_LONG_DESCRIPTION = 'long_description'
 ATTR_HOSTNAME = 'hostname'
 ATTR_TIMEZONE = 'timezone'
 ATTR_ARGS = 'args'