diff --git a/apps/gipy_uploader/pkg/gpconv.d.ts b/apps/gipy_uploader/pkg/gpconv.d.ts
index 9ded6a888..e97d230c3 100644
--- a/apps/gipy_uploader/pkg/gpconv.d.ts
+++ b/apps/gipy_uploader/pkg/gpconv.d.ts
@@ -2,9 +2,9 @@
 /* eslint-disable */
 /**
 * @param {string} input_str
-* @returns {string}
+* @returns {Uint8Array}
 */
-export function convert_gpx_strings(input_str: string): string;
+export function convert_gpx_strings(input_str: string): Uint8Array;
 
 export type InitInput = RequestInfo | URL | Response | BufferSource | WebAssembly.Module;
 
diff --git a/apps/gipy_uploader/pkg/gpconv.js b/apps/gipy_uploader/pkg/gpconv.js
index 7a9d8a777..58b6d4f26 100644
--- a/apps/gipy_uploader/pkg/gpconv.js
+++ b/apps/gipy_uploader/pkg/gpconv.js
@@ -74,16 +74,12 @@ function getInt32Memory0() {
     return cachedInt32Memory0;
 }
 
-const cachedTextDecoder = new TextDecoder('utf-8', { ignoreBOM: true, fatal: true });
-
-cachedTextDecoder.decode();
-
-function getStringFromWasm0(ptr, len) {
-    return cachedTextDecoder.decode(getUint8Memory0().subarray(ptr, ptr + len));
+function getArrayU8FromWasm0(ptr, len) {
+    return getUint8Memory0().subarray(ptr / 1, ptr / 1 + len);
 }
 /**
 * @param {string} input_str
-* @returns {string}
+* @returns {Uint8Array}
 */
 export function convert_gpx_strings(input_str) {
     try {
@@ -93,10 +89,11 @@ export function convert_gpx_strings(input_str) {
         wasm.convert_gpx_strings(retptr, ptr0, len0);
         var r0 = getInt32Memory0()[retptr / 4 + 0];
         var r1 = getInt32Memory0()[retptr / 4 + 1];
-        return getStringFromWasm0(r0, r1);
+        var v1 = getArrayU8FromWasm0(r0, r1).slice();
+        wasm.__wbindgen_free(r0, r1 * 1);
+        return v1;
     } finally {
         wasm.__wbindgen_add_to_stack_pointer(16);
-        wasm.__wbindgen_free(r0, r1);
     }
 }
 
diff --git a/apps/gipy_uploader/pkg/gpconv_bg.wasm b/apps/gipy_uploader/pkg/gpconv_bg.wasm
index cf24562a3..f71a5c38c 100644
Binary files a/apps/gipy_uploader/pkg/gpconv_bg.wasm and b/apps/gipy_uploader/pkg/gpconv_bg.wasm differ