diff --git a/lib/warbler/web_server.rb b/lib/warbler/web_server.rb
index 5dce7078..d2ac03fa 100644
--- a/lib/warbler/web_server.rb
+++ b/lib/warbler/web_server.rb
@@ -20,7 +20,7 @@ def local_path
           FileUtils.mkdir_p File.dirname(cached_path) #:nocov:
           require 'open-uri'                    #:nocov:
           begin
-            open(download_url) do |stream|        #:nocov:
+            URI.open(download_url) do |stream|        #:nocov:
               File.open(cached_path, "wb") do |f| #:nocov:
                 while buf = stream.read(4096) #:nocov:
                   f << buf                    #:nocov: