diff --git a/developer/bin/cask_pr_manual_check b/developer/bin/cask-pr-manual-check
similarity index 88%
rename from developer/bin/cask_pr_manual_check
rename to developer/bin/cask-pr-manual-check
index 248a08af15..46315e590b 100755
--- a/developer/bin/cask_pr_manual_check
+++ b/developer/bin/cask-pr-manual-check
@@ -16,8 +16,8 @@ abort 'PR needs to have a single file' if pr_json.count != 1
 
 file_raw_url = pr_json[0]['raw_url']
 file_name = File.basename(file_raw_url)
-local_file = "#{Dir.mktmpdir}/#{file_name}"
-IO.copy_stream(open(file_raw_url), local_file)
+local_file = File.join(Dir.mktmpdir, file_name)
 
+File.write(local_file, URI(file_raw_url).read)
 system('brew', 'cask', 'audit', '--download', local_file)
 system('brew', 'cask', 'style', local_file)