diff --git a/scripts/build-dmg.sh b/scripts/build-dmg.sh
index 1b47286..de53ae6 100755
--- a/scripts/build-dmg.sh
+++ b/scripts/build-dmg.sh
@@ -15,7 +15,9 @@ if [[ ! -d "$APP_PATH" ]]; then
     "$PROJECT_DIR/scripts/build-app.sh"
 fi
 
-ditto "$APP_PATH" "$STAGING_DIR/Task Manager.app"
+ditto --norsrc "$APP_PATH" "$STAGING_DIR/Task Manager.app"
+xattr -cr "$STAGING_DIR/Task Manager.app"
+codesign --verify --deep --strict "$STAGING_DIR/Task Manager.app"
 ln -s /Applications "$STAGING_DIR/Applications"
 
 hdiutil create \