diff --git a/Casks/kportal.rb b/Casks/kportal.rb
index b8ab9ec..7c75df5 100644
--- a/Casks/kportal.rb
+++ b/Casks/kportal.rb
@@ -1,24 +1,24 @@
 # This file was generated by GoReleaser. DO NOT EDIT.
 cask "kportal" do
-  version "0.13.2"
+  version "0.13.4"
 
   on_macos do
     on_arm do
-      sha256 "7e6c313b26eea2e803172095e4c2df3df7dd61473a186b04f40ae7407a5fb0e7"
+      sha256 "27aada00073a83c7b54314d09a2e537fbca7bb8a6068a372dbb49edb47c772ee"
       url "https://github.com/lukaszraczylo/kportal/releases/download/v#{version}/kportal-#{version}-darwin-arm64.tar.gz"
     end
     on_intel do
-      sha256 "93314dbb74e728ec8561cfb1cfe96448250a672d8c591d45d2f792d312fae3c9"
+      sha256 "8a87a84b82a94f9d9099b2c9df9dc0aa0562136a73dbe951fdbe9a81af85e461"
       url "https://github.com/lukaszraczylo/kportal/releases/download/v#{version}/kportal-#{version}-darwin-amd64.tar.gz"
     end
   end
   on_linux do
     on_arm do
-      sha256 "64eb78881f0d6a37cee45bb1b21a0d4321ee21619b8b373dbaa16f4cb104bc23"
+      sha256 "92833f2e5a2acdb687536ae1ba18bcf9214b1b170b37670a28ced5e68f4eced6"
       url "https://github.com/lukaszraczylo/kportal/releases/download/v#{version}/kportal-#{version}-linux-arm64.tar.gz"
     end
     on_intel do
-      sha256 "14f6099870c083df74dea1abfd0eb9ce1f49f22ae02dad94f01189045eb8ca35"
+      sha256 "1501e797539087beec2972717c4a4028e3fedbbe856a80ab70cfc2be58f30526"
       url "https://github.com/lukaszraczylo/kportal/releases/download/v#{version}/kportal-#{version}-linux-amd64.tar.gz"
     end
   end
@@ -33,9 +33,10 @@ cask "kportal" do
 
   binary "kportal"
 
-  postflight_steps do
-    on_macos do
-      run "/usr/bin/xattr", args: ["-dr", "com.apple.quarantine", "{{staged_path}}/kportal"]
+  postflight do
+    if OS.mac?
+      system_command "/usr/bin/xattr",
+                     args: ["-dr", "com.apple.quarantine", "#{staged_path}/kportal"]
     end
   end