diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 1.4.3.11
+
+* Disregard proxy environment variables in yesod devel [#945](https://github.com/yesodweb/yesod/pull/945)
+
 ## 1.4.3.10
 
 * Allow blaze-builder 0.4
diff --git a/Devel.hs b/Devel.hs
--- a/Devel.hs
+++ b/Devel.hs
@@ -68,6 +68,9 @@
 import           Network                               (withSocketsDo)
 import           Network.HTTP.Conduit                  (conduitManagerSettings, newManager)
 import           Data.Default.Class                    (def)
+#if MIN_VERSION_http_client(0,4,7)
+import           Network.HTTP.Client                   (managerSetProxy, noProxy)
+#endif
 import           Network.HTTP.ReverseProxy             (ProxyDest (ProxyDest),
                                                         waiProxyToSettings, wpsTimeout, wpsOnExc)
 import qualified Network.HTTP.ReverseProxy             as ReverseProxy
@@ -124,7 +127,11 @@
 -- 3001, give an appropriate message to the user.
 reverseProxy :: DevelOpts -> I.IORef Int -> IO ()
 reverseProxy opts iappPort = do
+#if MIN_VERSION_http_client(0,4,7)
+    manager <- newManager $ managerSetProxy noProxy conduitManagerSettings
+#else
     manager <- newManager conduitManagerSettings
+#endif
     let refreshHtml = LB.fromChunks $ return $(embedFile "refreshing.html")
     let onExc _ req
             | maybe False (("application/json" `elem`) . parseHttpAccept)
diff --git a/yesod-bin.cabal b/yesod-bin.cabal
--- a/yesod-bin.cabal
+++ b/yesod-bin.cabal
@@ -1,5 +1,5 @@
 name:            yesod-bin
-version:         1.4.3.10
+version:         1.4.3.11
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -78,6 +78,7 @@
                      , http-reverse-proxy >= 0.4
                      , network
                      , http-conduit       >= 2.1.4
+                     , http-client
                      , project-template   >= 0.1.1
                      , transformers
                      , transformers-compat