diff --git a/Casks/postbox.rb b/Casks/postbox.rb
index 60f415a7c8a..3dda4b19f56 100644
--- a/Casks/postbox.rb
+++ b/Casks/postbox.rb
@@ -1,6 +1,6 @@
 cask 'postbox' do
-  version '5.0.9,1_53cd26fb086aa4cbab01f5340f7dedad52bfc2ba'
-  sha256 'c0f2135dadd9ac2278d4bdd212040cefbc65088a191d8ac64c706b548715e187'
+  version '5.0.10,1_1dbed66fb640390bbb78503accb79331a74b5454'
+  sha256 '345f3133372e7e7d9398c9db97d3728b65f2dcac3c86f27880ec3b4cdb2a3946'
 
   # amazonaws.com/download.getpostbox.com was verified as official when first introduced to the cask
   url "https://s3.amazonaws.com/download.getpostbox.com/installers/#{version.before_comma}/#{version.after_comma}/postbox-#{version.before_comma}-mac64.dmg"