diff --git a/flat.js b/flat.js
index 042a89c..688375d 100644
--- a/flat.js
+++ b/flat.js
@@ -8,6 +8,7 @@ const path = require('path')
 
 const Promise = require('bluebird')
 
+const pkg = require('./package.json')
 const util = require('./util')
 const debuglog = util.debuglog
 const debugwarn = util.debugwarn
@@ -78,6 +79,7 @@ function flatApplicationAsync (opts) {
  * @returns {Promise} Promise.
  */
 var flatAsync = module.exports.flatAsync = function (opts) {
+  debuglog('electron-osx-sign@%s', pkg.version)
   return validateFlatOptsAsync(opts)
     .then(function () {
       var promise
diff --git a/sign.js b/sign.js
index baaa1f4..df435b6 100644
--- a/sign.js
+++ b/sign.js
@@ -9,6 +9,7 @@ const path = require('path')
 const Promise = require('bluebird')
 const compareVersion = require('compare-version')
 
+const pkg = require('./package.json')
 const util = require('./util')
 const debuglog = util.debuglog
 const debugwarn = util.debugwarn
@@ -216,6 +217,7 @@ function signApplicationAsync (opts) {
  * @returns {Promise} Promise.
  */
 var signAsync = module.exports.signAsync = function (opts) {
+  debuglog('electron-osx-sign@%s', pkg.version)
   return validateSignOptsAsync(opts)
     .then(function () {
       // Determine identity for signing