diff --git a/CHANGELOG.md b/CHANGELOG.md
index a53a8f5a..ceabbdb0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## <small>4.0.4 (2021-06-30)</small>
+
+* fix: fixed build issue ([fb26806](https://github.com/mountain-pass/waychaser/commit/fb26806))
+
+
+
 ## <small>4.0.3 (2021-06-29)</small>
 
 * Merge pull request #425 from mountain-pass/dependabot/npm_and_yarn/core-js-3.15.2 ([afcfd54](https://github.com/mountain-pass/waychaser/commit/afcfd54)), closes [#425](https://github.com/mountain-pass/waychaser/issues/425)
diff --git a/README.md b/README.md
index a6400a95..445b9024 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ This [isomorphic](https://en.wikipedia.org/wiki/Isomorphic_JavaScript) library i
 
 [![Quality](https://img.shields.io/codacy/grade/940768d54f7545f7b42f89b26c23c751?logo=codacy)](https://www.codacy.com/gh/mountain-pass/waychaser/dashboard?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=mountain-pass/waychaser&amp;utm_campaign=Badge_Grade) [![Coverage](https://img.shields.io/codacy/coverage/940768d54f7545f7b42f89b26c23c751?logo=codacy)](https://www.codacy.com/gh/mountain-pass/waychaser/dashboard?utm_source=github.com&utm_medium=referral&utm_content=mountain-pass/waychaser&utm_campaign=Badge_Coverage)
 
-[![source code vulnerabilities](https://img.shields.io/snyk/vulnerabilities/github/mountain-pass/waychaser?label=source%20code%20vulnerabilities&logo=snyk)](https://snyk.io/test/github/mountain-pass/waychaser) [![npm package vulnerabilities](https://img.shields.io/snyk/vulnerabilities/npm/@mountainpass/waychaser@4.0.3?label=npm%20package%20vulnerabilties&logo=snyk)](https://snyk.io/test/npm/@mountainpass/waychaser/4.0.3)
+[![source code vulnerabilities](https://img.shields.io/snyk/vulnerabilities/github/mountain-pass/waychaser?label=source%20code%20vulnerabilities&logo=snyk)](https://snyk.io/test/github/mountain-pass/waychaser) [![npm package vulnerabilities](https://img.shields.io/snyk/vulnerabilities/npm/@mountainpass/waychaser@4.0.4?label=npm%20package%20vulnerabilties&logo=snyk)](https://snyk.io/test/npm/@mountainpass/waychaser/4.0.4)
 
 
 [![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg)](https://conventionalcommits.org) [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
@@ -89,7 +89,7 @@ try {
 ```html
 <script
   type="text/javascript"
-  src="https://unpkg.com/@mountainpass/waychaser@4.0.3"
+  src="https://unpkg.com/@mountainpass/waychaser@4.0.4"
 ></script>
 
 ...