diff --git a/interface/src/system/UploadFirmwareForm.tsx b/interface/src/system/UploadFirmwareForm.tsx
index ac05ffcb5..79ca5a13a 100644
--- a/interface/src/system/UploadFirmwareForm.tsx
+++ b/interface/src/system/UploadFirmwareForm.tsx
@@ -23,7 +23,7 @@ class UploadFirmwareForm extends React.Component<UploadFirmwareFormProps> {
     return (
       <Fragment>
         <Box py={2}>
-          Upload a new firmware file below to replace the existing firmware.
+          Upload a new firmware file (.bin or .bin.gz) below to replace the existing firmware.
         </Box>
         <SingleUpload accept=".bin,.gz" onDrop={this.handleDrop} uploading={uploading} progress={progress} onCancel={onCancel} />
       </Fragment>