diff --git a/CHANGELOG.md b/CHANGELOG.md
index 64d3d35..00ebda8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+0.4.1 / 2018-01-15
+==================
+
+  * Name anonymous functions for call stack clarity
+
 0.4.0 / 2017-03-19
 ==================
 
diff --git a/lib/graceful-exit.js b/lib/graceful-exit.js
index 3037e69..f930348 100644
--- a/lib/graceful-exit.js
+++ b/lib/graceful-exit.js
@@ -6,7 +6,7 @@ var sockets = [];
  * Keep track of open connections so we can forcibly close sockets when the suicide timeout elapses
  * @param server HTTP server
  */
-exports.init = function (server) {
+exports.init = function init(server) {
   server.on('connection', function (socket) {
     sockets.push(socket);
 
@@ -16,7 +16,7 @@ exports.init = function (server) {
   });
 };
 
-exports.gracefulExitHandler = function(app, server, _options) {
+exports.gracefulExitHandler = function gracefulExitHandler(app, server, _options) {
   // Get the options set up
   if (!_options) {
     _options = {};
@@ -45,13 +45,14 @@ exports.gracefulExitHandler = function(app, server, _options) {
     if (options.callback) {
       if (_.isFunction(options.callback)) {
         options.callback(code);
+        options.callback = false;  // prevent 2nd call
       } else {
         logger("Registered callback is not a function");
       }
     }
     if (options.exitProcess) {
       // leave a bit of time to write logs, callback to complete, etc
-      setTimeout(function() {
+      setTimeout(function exitProcess() {
         process.exit(1);
       }, options.exitDelay);
     }
@@ -71,7 +72,7 @@ exports.gracefulExitHandler = function(app, server, _options) {
     // Everything was closed successfully, mission accomplished!
     connectionsClosed = true;
 
-    logger('All connections closed gracefully');
+    logger('No longer accepting connections');
     exit(0);
 
     clearTimeout(suicideTimeout);
@@ -108,7 +109,7 @@ exports.gracefulExitHandler = function(app, server, _options) {
   // If after an acceptable time limit is reached and we still have some
   // connections lingering around for some reason, just die... we tried to
   // be graceful, but failed.
-  suicideTimeout = setTimeout(function() {
+  suicideTimeout = setTimeout(function suicideHandler() {
     if (connectionsClosed) {
       // this condition should never occur, see server.close() above
       // user callback, if any, has already been called
@@ -131,14 +132,14 @@ exports.gracefulExitHandler = function(app, server, _options) {
   }, options.suicideTimeout);
 };
 
-exports.middleware = function(app) {
+exports.middleware = function middleware(app) {
   // This flag is used to tell the middleware we create that the server wants
-  // to stop, so we do not allow anymore connections. This is done for all new
+  // to stop, so we do not allow any more connections. This is done for all new
   // connections for us by Node, but we need to handle the connections that are
   // using the Keep-Alive header to stay on.
   app.set('graceful_exit', false);
 
-  return function(req, res, next) {
+  return function checkGracefulExit(req, res, next) {
     // Sorry Keep-Alive connections, but we need to part ways
     if (app.settings.graceful_exit === true) {
       req.connection.setTimeout(1);
diff --git a/package.json b/package.json
index fdc1cfc..8c7ced8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "express-graceful-exit",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "Allow graceful exits for express apps, supporting zero downtime deploys",
   "keywords": [
     "express",