diff --git a/popup.html b/popup.html
index 4588c18..948a2d0 100644
--- a/popup.html
+++ b/popup.html
@@ -26,6 +26,7 @@
         <label for="scheme">Challenge scheme</label>
         <select id="scheme">
           <option value="CommonWV">CommonWV</option>
+          <option value="Comcast">Comcast Xfinity</option>
           <option value="DRMToday">DRMToday</option>
           <option value="GlobalTV">GlobalTV</option>
           <option value="Polsat">Polsat</option>
diff --git a/python/schemes/Comcast.py b/python/schemes/Comcast.py
new file mode 100644
index 0000000..1b9c758
--- /dev/null
+++ b/python/schemes/Comcast.py
@@ -0,0 +1,7 @@
+from pyodide.ffi import to_js
+req = json.loads(base64.b64decode(licBody.encode()).decode())
+b64challenge = base64.b64encode(challenge).decode()
+req['licenseRequest'] = b64challenge
+res = await js.corsFetch(licUrl, "POST", to_js(licHeaders), json.dumps(req))
+res = json.loads(base64.b64decode(res.encode()).decode())
+licence = base64.b64decode(res['license'].encode())
diff --git a/selectRules.conf b/selectRules.conf
index 7637159..79e37ad 100644
--- a/selectRules.conf
+++ b/selectRules.conf
@@ -1,5 +1,6 @@
 cwip-shaka-proxy
 c4.eme.lp.aws.redbee$$RedBee
+comcast.net/license$$Comcast
 lic.staging.drmtoday$$DRMToday
 corusappservices.com/authorization/widevine/getresourcekey$$GlobalTV
 b2c-www.redefine.pl/rpc/drm$$Polsat