diff --git a/docs/api/session.md b/docs/api/session.md
index 74c35cd0fd..1b0116c118 100644
--- a/docs/api/session.md
+++ b/docs/api/session.md
@@ -290,8 +290,8 @@ win.webContents.session.setCertificateVerifyProc((request, callback) => {
   * `callback` Function
     * `permissionGranted` Boolean - Allow or deny the permission.
   * `details` Object - Some properties are only available on certain permission types.
-    * `externalURL` String (Optional) - The url of the `openExternal` request.
-    * `mediaTypes` String[] (Optional) - The types of media access being requested, elements can be `video`
+    * `externalURL` String (optional) - The url of the `openExternal` request.
+    * `mediaTypes` String[] (optional) - The types of media access being requested, elements can be `video`
       or `audio`
     * `requestingUrl` String - The last URL the requesting frame loaded
     * `isMainFrame` Boolean - Whether the frame making the request is the main frame