diff --git a/package.json b/package.json
index 5939f8598d3..3153d0568ba 100644
--- a/package.json
+++ b/package.json
@@ -132,7 +132,7 @@
     "build:dev": "./scripts/generate_build.mjs --dev-mode",
     "build:all": "npm run build:wasm:release && npm run bundle && npm run bundle:min && npm run build",
     "build:wasm:debug": "mkdir -p dist && cd ./src/parsers/manifest/dash/wasm-parser && cargo build --target wasm32-unknown-unknown && cp target/wasm32-unknown-unknown/debug/mpd_node_parser.wasm ../../../../../dist/mpd-parser.wasm",
-    "build:wasm:release": "mkdir -p dist && cd ./src/parsers/manifest/dash/wasm-parser && cargo build --target wasm32-unknown-unknown --release && node ../../../../../scripts/wasm-optimize.mjs target/wasm32-unknown-unknown/release/mpd_node_parser.wasm ../../../../../dist/mpd-parser.wasm && cd ../../../../../ && npm run wasm-strip",
+    "build:wasm:release": "mkdir -p dist && cd ./src/parsers/manifest/dash/wasm-parser && cargo build --target wasm32-unknown-unknown --release && wasm-opt target/wasm32-unknown-unknown/release/mpd_node_parser.wasm --signext-lowering -O4 -o ../../../../../dist/mpd-parser.wasm && cd ../../../../../ && npm run wasm-strip",
     "bundle": "webpack --progress --config webpack.config.mjs --env production",
     "bundle:min": "webpack --progress --config webpack.config.mjs --env minify --env production",
     "bundle:min:watch": "webpack --progress --config webpack.config.mjs -w --env production --env minify",