diff --git a/Casks/game-porting-toolkit.rb b/Casks/game-porting-toolkit.rb
index 783b96f..063be26 100644
--- a/Casks/game-porting-toolkit.rb
+++ b/Casks/game-porting-toolkit.rb
@@ -29,6 +29,10 @@
   binary "#{appdir}/Game Porting Toolkit.app/Contents/Resources/wine/bin/wine64-preloader"
   binary "#{appdir}/Game Porting Toolkit.app/Contents/Resources/wine/bin/wineserver"
 
+  postflight do
+    system "xattr", "-drs", "com.apple.quarantine", "#{appdir}/Game Porting Toolkit.app"
+  end
+
   zap trash: [
         "~/.local/share/applications/wine*",
         "~/.local/share/icons/hicolor/**/application-x-wine*",
diff --git a/Casks/portingkit.rb b/Casks/portingkit.rb
index 32382f5..1051bb2 100644
--- a/Casks/portingkit.rb
+++ b/Casks/portingkit.rb
@@ -9,6 +9,10 @@
 
   app "Porting kit.app"
 
+  postflight do
+    system "xattr", "-drs", "com.apple.quarantine", "#{appdir}/Porting kit.app"
+  end
+
   caveats <<~EOS
     With #{token}, you can install Windows games and apps on macOS easily
     using Wineskin technology!
diff --git a/Casks/wine-crossover.rb b/Casks/wine-crossover.rb
index c184013..0aeb597 100644
--- a/Casks/wine-crossover.rb
+++ b/Casks/wine-crossover.rb
@@ -39,6 +39,10 @@
   binary "#{appdir}/Wine Crossover.app/Contents/Resources/wine/bin/winepath"
   binary "#{appdir}/Wine Crossover.app/Contents/Resources/wine/bin/wineserver"
 
+  postflight do
+    system "xattr", "-drs", "com.apple.quarantine", "#{appdir}/Wine Crossover.app"
+  end
+
   caveats <<~EOS
     #{token} supports running 32-bit & 64-bit windows binaries.
 
diff --git a/Casks/wineskin-devel.rb b/Casks/wineskin-devel.rb
index 16bcb58..ee2d137 100644
--- a/Casks/wineskin-devel.rb
+++ b/Casks/wineskin-devel.rb
@@ -17,6 +17,7 @@
   # Workaround issue until it's fixed in Winery
   # https://github.com/Gcenx/WineskinServer/issues/96
   preflight do
+    system "xattr", "-drs", "com.apple.quarantine", "#{appdir}/Wineskin Winery.app"
     system_command "/bin/mkdir", args: ["-p", "/Users/#{ENV.fetch("USER")}/Applications/Wineskin"], sudo: false
   end
 
diff --git a/Casks/wineskin.rb b/Casks/wineskin.rb
index 03afa14..f4bb052 100644
--- a/Casks/wineskin.rb
+++ b/Casks/wineskin.rb
@@ -18,6 +18,7 @@
   # Workaround issue until it's fixed in Winery
   # https://github.com/Gcenx/WineskinServer/issues/96
   preflight do
+    system "xattr", "-drs", "com.apple.quarantine", "#{appdir}/Wineskin Winery.app"
     system_command "/bin/mkdir", args: ["-p", "/Users/#{ENV.fetch("USER")}/Applications/Wineskin"], sudo: false
   end