diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97ea671..f85ff0a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+<a name="1.0.4"></a>
+## [1.0.4](https://github.com/kumarharsh/custom-event-polyfill/compare/v1.0.3...v1.0.4) (2018-05-23)
+
+
+### Bug Fixes
+
+* Use correct test for undefined window ([21a1b95](https://github.com/kumarharsh/custom-event-polyfill/commit/21a1b95))
+
 <a name="1.0.3"></a>
 ## [1.0.3](https://github.com/kumarharsh/custom-event-polyfill/compare/v1.0.2...v1.0.3) (2018-05-15)