diff --git a/Casks/boinc.rb b/Casks/boinc.rb
index 8b548139d69..0f7a60b5804 100644
--- a/Casks/boinc.rb
+++ b/Casks/boinc.rb
@@ -11,4 +11,6 @@ cask 'boinc' do
   pkg "boinc_#{version}_macOSX_x86_64/BOINC Installer.app/Contents/Resources/BOINC.pkg"
 
   uninstall pkgutil: 'edu.berkeley.boinc'
+
+  zap delete: '~/Library/Caches/edu.berkeley.boinc'
 end