diff --git a/src/modules/parcel-sync/services/epay-storage.ts b/src/modules/parcel-sync/services/epay-storage.ts
index 7c5a8b4..19159f6 100644
--- a/src/modules/parcel-sync/services/epay-storage.ts
+++ b/src/modules/parcel-sync/services/epay-storage.ts
@@ -89,10 +89,17 @@ export async function storeCfExtract(
   // Store in subfolder per cadastral number
   const path = `parcele/${nrCadastral}/${fileName}`;
 
-  await minioClient.putObject(BUCKET, path, pdfBuffer, pdfBuffer.length, {
+  // Strip diacritics from metadata values — MinIO headers only accept ASCII
+  const safeMetadata: Record<string, string> = {
     "Content-Type": "application/pdf",
-    ...metadata,
-  });
+  };
+  for (const [key, value] of Object.entries(metadata)) {
+    safeMetadata[key] = value
+      .normalize("NFD")
+      .replace(/[\u0300-\u036f]/g, "");
+  }
+
+  await minioClient.putObject(BUCKET, path, pdfBuffer, pdfBuffer.length, safeMetadata);
 
   console.log(
     `[epay-storage] Stored: ${path} (${pdfBuffer.length} bytes)`,