diff --git a/pages/download.html b/pages/download.html
index 1c7a44c..6582f9e 100644
--- a/pages/download.html
+++ b/pages/download.html
@@ -34,7 +34,7 @@
                 download
             </button>
             
-            <div style="min-height:20px" />
+            <div style="min-height:15px" />
         </div>
     </div>
 </body>
diff --git a/src/server/index.ts b/src/server/index.ts
index 9451cb9..49c38cb 100644
--- a/src/server/index.ts
+++ b/src/server/index.ts
@@ -170,6 +170,9 @@ app.get("/download/:fileId",(req,res) => {
 let fgRQH = async (req:express.Request,res:express.Response) => {
     files.readFileStream(req.params.fileId).then(f => {
         res.setHeader("Content-Type",f.contentType)
+        if (f.byteSize) {
+            res.setHeader("Content-Length",f.byteSize)
+        }
         res.status(200)
         f.dataStream.pipe(res)
     }).catch((err) => {
diff --git a/src/server/lib/files.ts b/src/server/lib/files.ts
index 9cd39f0..224ab75 100644
--- a/src/server/lib/files.ts
+++ b/src/server/lib/files.ts
@@ -215,7 +215,7 @@ export default class Files {
 
     // todo: move read code here
 
-    readFileStream(uploadId: string):Promise<{dataStream:Readable,contentType:string}> {
+    readFileStream(uploadId: string):Promise<{dataStream:Readable,contentType:string,byteSize?:number}> {
         return new Promise(async (resolve,reject) => {
             if (!this.uploadChannel) {
                 reject({status:503,message:"server is not ready - please try again later"})
@@ -231,7 +231,8 @@ export default class Files {
 
                 resolve({
                     contentType: file.mime,
-                    dataStream: dataStream
+                    dataStream: dataStream,
+                    byteSize: file.sizeInBytes
                 })
         
                 for (let i = 0; i < file.messageids.length; i++) {