diff --git a/CHANGELOG.md b/CHANGELOG.md
index 50ead8a..354ba42 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+### [3.9.1](https://github.com/biothings/biomedical_id_resolver.js/compare/v3.9.0...v3.9.1) (2021-06-22)
+
 ## [3.9.0](https://github.com/kevinxin90/biomedical_id_resolver.js/compare/v3.8.0...v3.9.0) (2021-04-27)
 
 
diff --git a/package-lock.json b/package-lock.json
index 42d027f..77f37b5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "biomedical_id_resolver",
-  "version": "3.9.0",
+  "version": "3.9.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
diff --git a/package.json b/package.json
index 4c80c41..7b76c67 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "biomedical_id_resolver",
-  "version": "3.9.0",
+  "version": "3.9.1",
   "description": "js library for converting biomedical entity ids in batch",
   "main": "built/index.js",
   "scripts": {