diff --git a/index.js b/index.js
index 9615346c..039c6c00 100644
--- a/index.js
+++ b/index.js
@@ -76,6 +76,7 @@ var defer = typeof setImmediate === 'function'
  * @param {Boolean} [options.proxy]
  * @param {Boolean} [options.resave] Resave unmodified sessions back to the store
  * @param {Boolean} [options.rolling] Enable/disable rolling session expiration
+ * @param {Function} [options.sessionid] Manually set session ID
  * @param {Boolean} [options.saveUninitialized] Save uninitialized sessions to the store
  * @param {String|Array} [options.secret] Secret for signing session ID
  * @param {Object} [options.store=MemoryStore] Session store
@@ -99,6 +100,8 @@ function session(options) {
   // get the session store
   var store = opts.store || new MemoryStore()
 
+  var getManualSessionId = options.sessionid || function(req) {};
+  
   // get the trust proxy setting
   var trustProxy = opts.proxy
 
@@ -156,7 +159,7 @@ function session(options) {
 
   // generates the new session
   store.generate = function(req){
-    req.sessionID = generateId(req);
+    req.sessionID = getManualSessionId(req) ? getManualSessionId(req) : generateId(req);
     req.session = new Session(req);
     req.session.cookie = new Cookie(cookieOptions);
 
@@ -214,7 +217,7 @@ function session(options) {
     req.sessionStore = store;
 
     // get the session ID from the cookie
-    var cookieId = req.sessionID = getcookie(req, name, secrets);
+    var cookieId = req.sessionID = getManualSessionId(req) ? getManualSessionId(req) : getcookie(req, name, secrets)
 
     // set-cookie
     onHeaders(res, function(){
diff --git a/package.json b/package.json
index adadb821..c981740e 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "express-session",
+  "name": "@hokify/express-session-manual",
   "version": "1.17.1",
   "description": "Simple session middleware for Express",
   "author": "TJ Holowaychuk <tj@vision-media.ca> (http://tjholowaychuk.com)",