diff --git a/README.md b/README.md
index be00dc20..6ca75c1d 100644
--- a/README.md
+++ b/README.md
@@ -409,6 +409,8 @@ and test server, see "Transactions and database setup" below.
 
 ### <a name="capybara-webkit"></a>Capybara-webkit
 
+Note: `capybara-webkit` depends on QtWebkit which went EOL quite some time ago. There has been an attempt to revive the project but `capybara-webkit` is not yet (AFAIK) compatible with the revived version of QtWebKit (could be a good OSS project for someone) and as such is still limited to an old version of QtWebKit.  This means its support for modern JS and CSS is severely limited. Y
+
 The [capybara-webkit driver](https://github.com/thoughtbot/capybara-webkit) is for true headless
 testing. It uses QtWebKit to start a rendering engine process. It can execute JavaScript as well.
 It is significantly faster than drivers like Selenium since it does not load an entire browser.
@@ -427,6 +429,8 @@ Capybara.javascript_driver = :webkit
 
 ### <a name="poltergeist"></a>Poltergeist
 
+Note: `poltergeist` depends on PhantomJS for which active development ended quite some time ago (2.1.1). As such it is roughly equivalent to a 6-7 year old version of Safari, meaning lack of support for modern JS And CSS. If any effort to update PhantomJS succeeds in the future this situation could change.
+
 [Poltergeist](https://github.com/teampoltergeist/poltergeist) is another
 headless driver which integrates Capybara with
 [PhantomJS](http://phantomjs.org/). It is truly headless, so doesn't