diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6330603dd2..4fab33841a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # 1.13.0
 
  * Put experimental ES7 features behind a flag `--experimental` and `experimental` option.
+ * Constructor speed performance increase. Thanks [@RReverser](https://github.com/RReverser).
+ * Use `self` instead of `window` in the optional 6to5 runtime. Thanks [@RReverser](https://github.com/RReverser).
 
 # 1.12.26