diff --git a/voussoirkit/flasktools.py b/voussoirkit/flasktools.py
index 268a56c..b532b11 100644
--- a/voussoirkit/flasktools.py
+++ b/voussoirkit/flasktools.py
@@ -1,5 +1,7 @@
+import flask
 import gzip
 import io
+import werkzeug.wrappers
 
 from voussoirkit import bytestring
 
@@ -7,6 +9,9 @@ GZIP_MINIMUM_SIZE = 500 * bytestring.BYTE
 GZIP_MAXIMUM_SIZE = 5 * bytestring.MIBIBYTE
 GZIP_LEVEL = 3
 
+REQUEST_TYPES = (flask.Request, werkzeug.wrappers.Request, werkzeug.local.LocalProxy)
+RESPONSE_TYPES = (flask.Response, werkzeug.wrappers.Response)
+
 def gzip_response(request, response):
     if response.direct_passthrough:
         return response