diff --git a/spec/spec-bootstrap.coffee b/spec/spec-bootstrap.coffee
index a5821399a..060d0173e 100644
--- a/spec/spec-bootstrap.coffee
+++ b/spec/spec-bootstrap.coffee
@@ -13,7 +13,7 @@ try
   require '../src/window'
   NylasEnvConstructor = require '../src/nylas-env'
   window.NylasEnv = window.atom = NylasEnvConstructor.loadOrCreate()
-  global.Promise.longStackTraces() if NylasEnv.inDevMode()
+  global.Promise.config({longStackTraces: true}) if NylasEnv.inDevMode()
 
   # Show window synchronously so a focusout doesn't fire on input elements
   # that are focused in the very first spec run.
diff --git a/src/nylas-env.coffee b/src/nylas-env.coffee
index 723f3abd2..cd6abccb3 100644
--- a/src/nylas-env.coffee
+++ b/src/nylas-env.coffee
@@ -243,7 +243,7 @@ class NylasEnvConstructor
       @reportError(error, {promise})
 
     if @inSpecMode() or @inDevMode()
-      Promise.longStackTraces()
+      Promise.config({longStackTraces: true})
 
   _createErrorCallbackEvent: (error, extraArgs={}) ->
     event = _.extend({}, extraArgs, {
diff --git a/src/secondary-window-bootstrap.coffee b/src/secondary-window-bootstrap.coffee
index 768e7b30b..6fc12044b 100644
--- a/src/secondary-window-bootstrap.coffee
+++ b/src/secondary-window-bootstrap.coffee
@@ -19,7 +19,7 @@ require './window'
 NylasEnvConstructor = require './nylas-env'
 window.NylasEnv = window.atom = NylasEnvConstructor.loadOrCreate()
 
-global.Promise.longStackTraces() if NylasEnv.inDevMode()
+global.Promise.config({longStackTraces: true}) if NylasEnv.inDevMode()
 
 NylasEnv.initialize()
 NylasEnv.startSecondaryWindow()
diff --git a/src/window-bootstrap.coffee b/src/window-bootstrap.coffee
index 990f42d35..e67511083 100644
--- a/src/window-bootstrap.coffee
+++ b/src/window-bootstrap.coffee
@@ -8,7 +8,7 @@ require './window'
 
 NylasEnvConstructor = require './nylas-env'
 window.NylasEnv = window.atom = NylasEnvConstructor.loadOrCreate()
-global.Promise.longStackTraces() if NylasEnv.inDevMode()
+global.Promise.config({longStackTraces: true}) if NylasEnv.inDevMode()
 NylasEnv.initialize()
 NylasEnv.startRootWindow()