diff --git a/cmd/wasm/main.go b/cmd/wasm/main.go
index 25ed682..faf7b7e 100644
--- a/cmd/wasm/main.go
+++ b/cmd/wasm/main.go
@@ -93,7 +93,9 @@ var toParquet = js.FuncOf(func(this js.Value, args []js.Value) any {
 
 	input := strings.NewReader(args[0].String())
 	output := &bytes.Buffer{}
-	convertErr := geojson.ToParquet(input, output, &geojson.ConvertOptions{MinFeatures: 10, MaxFeatures: 250})
+	convertErr := geojson.ToParquet(input, output, &geojson.ConvertOptions{
+		MinFeatures: 10, MaxFeatures: 250, Compression: "zstd",
+	})
 
 	if convertErr != nil {
 		return returnFromError(convertErr)