diff --git a/packages/file_server/src/controllers/upload/routes/post/chunk.js b/packages/file_server/src/controllers/upload/routes/post/chunk.js
index ff417cc4..f3e96bb4 100644
--- a/packages/file_server/src/controllers/upload/routes/post/chunk.js
+++ b/packages/file_server/src/controllers/upload/routes/post/chunk.js
@@ -69,7 +69,7 @@ export default async (req, res) => {
                             info: build.metadata
                         })
 
-                        url = path.join(`https://`, process.env.B2_CDN_ENDPOINT, process.env.B2_BUCKET, remotePath)
+                        url = `https://${process.env.B2_CDN_ENDPOINT}/${process.env.B2_BUCKET}/${remotePath}`
 
                         break
                     }