diff --git a/lib/download.rb b/lib/download.rb
index 45ae6982..99eee637 100644
--- a/lib/download.rb
+++ b/lib/download.rb
@@ -28,16 +28,17 @@ module Danbooru
     while true
       url = Addressable::URI.parse(source)
       url.host = url.normalized_host
+
+      unless url.scheme == 'http' or url.scheme == 'https'
+        raise SocketError, "URL must be HTTP or HTTPS"
+      end
+
       # check if the request uri is not percent-encoded
       if url.request_uri.match /[^!*'();:@&=+$,\/?#\[\]ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\-_.~%]/
         url.path = Addressable::URI.encode(url.path)
         url.query = Addressable::URI.encode(url.query)
       end
 
-      unless url.scheme == 'http' or url.scheme == 'https'
-        raise SocketError, "URL must be HTTP or HTTPS"
-      end
-
       unless url.port
         url.port = url.scheme == 'https' ? 443 : 80
       end