Update README.md

README.md

@@ -14,7 +14,7 @@ It's very easy for someone to hide this malicious behaviour, making it nearly im
 
 Setting Content Security Policy headers helps solve this problem. These headers dictate which sites your site is allowed to contact. This package makes it easy for you to set the right headers.
 
-This readme does not aim to fully explain all the possible usages of CSP and it's directives. We highly recommend that you read [Mozilla's documentation on the Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP)) before using this package.
+This readme does not aim to fully explain all the possible usages of CSP and it's directives. We highly recommend that you read [Mozilla's documentation on the Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP)) before using this package. Another good resource to learn about CSP, is [this edition of the Larasec newsletter](https://larasec.substack.com/p/in-depth-content-security-policy) by Stephen Rees-Carter.
 
 If you're an audio visual learner you should check out this video on how to use this package.
 https://www.laraning.com/videos/spatie-csp-content-security-policy