diff --git a/build-scripts/prepare-web.sh b/build-scripts/prepare-web.sh
index cc48f05ad3713..84665e5512ffa 100755
--- a/build-scripts/prepare-web.sh
+++ b/build-scripts/prepare-web.sh
@@ -26,7 +26,7 @@ rm -rf $DATA_DIR/mods/MA
 echo "Removing Ultica_iso tileset..."
 rm -rf $BUNDLE_DIR/gfx/Ultica_iso
 
-$EMSDK/upstream/emscripten/tools/file_packager cataclysm-tiles.data --js-output=cataclysm-tiles.data.js --no-node --preload "$BUNDLE_DIR""@/"
+$EMSDK/upstream/emscripten/tools/file_packager cataclysm-tiles.data --js-output=cataclysm-tiles.data.js --no-node --preload "$BUNDLE_DIR""@/" --lz4
 
 mkdir -p build/
 cp \