diff --git a/packages/server/src/utilities/fileSystem/index.js b/packages/server/src/utilities/fileSystem/index.js
index e421d19275..8e93d33ed9 100644
--- a/packages/server/src/utilities/fileSystem/index.js
+++ b/packages/server/src/utilities/fileSystem/index.js
@@ -107,7 +107,7 @@ exports.loadHandlebarsFile = path => {
 exports.apiFileReturn = contents => {
   const path = join(budibaseTempDir(), uuid())
   fs.writeFileSync(path, "\ufeff" + contents)
-  let readerStream = fs.createReadStream(path)
+  const readerStream = fs.createReadStream(path)
   readerStream.setEncoding("binary")
   return readerStream
 }