diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 4590013f19..4e72f1d09e 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -1,6 +1,6 @@
 {
   "name": "firebase-admin",
-  "version": "4.2.0",
+  "version": "4.2.1",
   "dependencies": {
     "@types/jsonwebtoken": {
       "version": "7.2.0",
diff --git a/package.json b/package.json
index 748793c222..ed9512a0a7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "firebase-admin",
-  "version": "4.2.0",
+  "version": "4.2.1",
   "description": "Firebase admin SDK for Node.js",
   "author": "Firebase (https://firebase.google.com/)",
   "license": "SEE LICENSE IN https://firebase.google.com/terms/",