diff --git a/Casks/psi.rb b/Casks/psi.rb
index 4bf6df82c76..f71ec7bd8f2 100644
--- a/Casks/psi.rb
+++ b/Casks/psi.rb
@@ -9,4 +9,12 @@ cask 'psi' do
   license :gpl
 
   app 'Psi.app'
+
+  uninstall quit: 'org.psi-im'
+
+  zap delete: [
+                '~/Library/Saved Application State/org.psi-im.savedState',
+                '~/Library/Caches/Psi',
+                '~/Library/Application Support/Psi',
+              ]
 end