diff --git a/04-Considering_Safety.md b/04-Considering_Safety.md
index 984a8cc..b36a58d 100644
--- a/04-Considering_Safety.md
+++ b/04-Considering_Safety.md
@@ -67,3 +67,6 @@ Exceptions cannot be ignored. Return values, such as using `boost::optional`, ca
 
 Stroustrup, the original designer of C++, [makes this point](http://www.stroustrup.com/bs_faq2.html#exceptions-why) much better than I ever could.
 
+## Additional Resources
+
+[How to Prevent The Next Heartbleed](http://www.dwheeler.com/essays/heartbleed.html) by David Wheeler is a good analysis of the current state of code safety and how to ensure safe code.