diff --git a/Devel.hs b/Devel.hs
index 4289317..c951e37 100644
--- a/Devel.hs
+++ b/Devel.hs
@@ -144,7 +144,7 @@ reverseProxy opts appPortVar = do
                     appPort <- atomically $ readTVar appPortVar
                     return $
                         ReverseProxy.WPRProxyDest
-                        $ ProxyDest "127.0.0.1" appPort)
+                        $ ProxyDest "::1" appPort)
                 def
                     { wpsOnExc = \e req f -> onExc e req >>= f
                     , wpsTimeout =