diff --git a/app/api/routes/progressive_storage.py b/app/api/routes/progressive_storage.py
index 652aa32..72b239b 100644
--- a/app/api/routes/progressive_storage.py
+++ b/app/api/routes/progressive_storage.py
@@ -7,6 +7,7 @@ from mimetypes import guess_type
 
 import aiofiles
 from base58 import b58encode
+from base64 import b64decode
 from sanic import response
 
 from app.core.logger import make_log
@@ -34,6 +35,7 @@ async def s_api_v1_5_storage_post(request):
         return response.json({"error": "Invalid X-Content-SHA256 header format"}, status=400)
     
     provided_filename = request.headers.get("X-File-Name")
+    provided_filename = b64decode(provided_filename).decode("utf-8")
 
     # Check if the file already exists in the database
     db_session = request.ctx.db_session
diff --git a/uploader_test.html b/uploader_test.html
index b2ce0a9..b0ed2d1 100644
--- a/uploader_test.html
+++ b/uploader_test.html
@@ -107,16 +107,18 @@
         const hashHex = await computeSHA256(file);
         appendLog(`Computed SHA-256 hash: ${hashHex}`);
   
-        // Prepare the POST request with file as body and header X-Content-SHA256
+              // Prepare the POST request with file as body and additional header for filename
+        const encodedFileName = btoa(unescape(encodeURIComponent(file.name)));
         const response = await fetch(BASE_URL, {
           method: "POST",
           headers: {
             "X-Content-SHA256": hashHex,
-            "X-File-Name": file.name, // NEW: передаём имя файла
+            "X-File-Name": encodedFileName, // NEW: передаём имя файла в base64
             "Content-Type": file.type || "application/octet-stream"
           },
           body: file
         });
+
   
         if (!response.ok) {
           const errorData = await response.json();