diff --git a/apps/envited.ascs.digital/common/asset/utils.ts b/apps/envited.ascs.digital/common/asset/utils.ts
index 73ce8ef3..23171685 100644
--- a/apps/envited.ascs.digital/common/asset/utils.ts
+++ b/apps/envited.ascs.digital/common/asset/utils.ts
@@ -47,6 +47,12 @@ export const createFilename = _createFilename({
   CID,
 })
 
+export const jsonToUint8Array = (json: object): Uint8Array => {
+  const jsonString = JSON.stringify(json)
+  const buffer = Buffer.from(jsonString)
+  return new Uint8Array(buffer)
+}
+
 export const getFileFromByteArray = async (byteArray: Uint8Array, filename: string) =>
   extractFromByteArray(byteArray, filename).then(read)
 
@@ -142,7 +148,7 @@ export const getPathAndBufferFromFile = _getPathAndBufferFromFile({
 export const _getFilenameFromFile =
   ({ createFilename }: { createFilename: (byteArray: Uint8Array) => Promise<string> }) =>
   async (path: string, type: string, arrayBuffer: ArrayBuffer): Promise<ExtractedFileWithCID> => ({
-    cid: await createFilename(Buffer.from(arrayBuffer)),
+    cid: await createFilename(new Uint8Array(arrayBuffer)),
     path,
     type,
     arrayBuffer,
diff --git a/apps/envited.ascs.digital/common/asset/validateAndCreateMetadata.ts b/apps/envited.ascs.digital/common/asset/validateAndCreateMetadata.ts
index 6b52ed6d..1a1c412b 100644
--- a/apps/envited.ascs.digital/common/asset/validateAndCreateMetadata.ts
+++ b/apps/envited.ascs.digital/common/asset/validateAndCreateMetadata.ts
@@ -19,6 +19,7 @@ import {
   getDomainMetadataPath,
   getFileFromByteArray,
   getFilesAsPathAndByteArrayFromManifest,
+  jsonToUint8Array,
 } from './utils'
 
 export const _getShaclSchemaAndValidate =
@@ -230,7 +231,7 @@ export const _validateAndCreateMetadata =
     try {
       const { conforms, reports, data } = await getShaclSchemaAndValidate(byteArray)
       const assetCID = await createFilename(byteArray)
-      const domainMetadataCID = await createFilename(Buffer.from(JSON.stringify(data.domainMetadata)))
+      const domainMetadataCID = await createFilename(jsonToUint8Array(data.domainMetadata))
       const connection = await db()
       const user = await connection.getUserById(asset.userId)
       if (!user) {
@@ -250,7 +251,7 @@ export const _validateAndCreateMetadata =
         visualizationFiles,
       })(data.manifest)
       const modifiedManifestBuffer = Buffer.from(JSON.stringify(modifiedManifest))
-      const modifiedManifestCID = await createFilename(modifiedManifestBuffer)
+      const modifiedManifestCID = await createFilename(jsonToUint8Array(modifiedManifest))
 
       const assetObject = {
         cid: assetCID,