diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index c30217b8fec883d10d41c39eaa19632442033727..44b8fa843d64c43c4da2a1e8c413f9a03797056b 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,3 +1,8 @@
+*   Extract source code for the entire exception stack trace for
+    better debugging and diagnosis.
+
+    *Ryan Dao*
+
 *   Allows ActionDispatch::Request::LOCALHOST to match any IPv4 127.0.0.0/8
     loopback address.