diff --git a/package-lock.json b/package-lock.json
index 85f8122..57ace7e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "wsse",
-  "version": "5.0.0",
+  "version": "5.1.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index bb07d90..572d479 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "wsse",
   "description": "WSSE Username Token generator for Node.js",
-  "version": "5.0.0",
+  "version": "5.1.0",
   "author": {
     "name": "bouzuya",
     "email": "m@bouzuya.net",