diff --git a/Network/Wreq/Cache.hs b/Network/Wreq/Cache.hs
--- a/Network/Wreq/Cache.hs
+++ b/Network/Wreq/Cache.hs
@@ -22,7 +22,7 @@
 import Data.Maybe (listToMaybe)
 import Data.Monoid (First(..), mconcat)
 import Data.Time.Clock (UTCTime, addUTCTime, getCurrentTime)
-import Data.Time.Format (parseTime)
+import Data.Time.Format (parseTimeM)
 import Data.Time.Locale.Compat (defaultTimeLocale)
 import Data.Typeable (Typeable)
 import GHC.Generics (Generic)
@@ -150,4 +150,4 @@
   , "%A, %d-%b-%y %H:%M:%S %Z"
   , "%a %b %e %H:%M:%S %Y"
   ]
-  where tryout fmt = First $ parseTime defaultTimeLocale fmt (B.unpack s)
+  where tryout fmt = First $ parseTimeM True defaultTimeLocale fmt (B.unpack s)
diff --git a/Network/Wreq/Session.hs b/Network/Wreq/Session.hs
--- a/Network/Wreq/Session.hs
+++ b/Network/Wreq/Session.hs
@@ -65,6 +65,7 @@
     , putWith
     , deleteWith
     , customMethodWith
+    , customPayloadMethodWith
     -- * Extending a session
     , Lens.seshRun
     ) where
@@ -177,6 +178,14 @@
 -- | 'Session'-specific version of 'Network.Wreq.customMethodWith'.
 customMethodWith :: String -> Options -> Session -> String -> IO (Response L.ByteString)
 customMethodWith method opts sesh url = run string sesh =<< prepareMethod methodBS opts url
+  where
+    methodBS = BC8.pack method
+
+-- | 'Session'-specific version of 'Network.Wreq.customPayloadMethodWith'.
+customPayloadMethodWith :: Postable a => String -> Options -> Session -> String -> a
+                        -> IO (Response L.ByteString)
+customPayloadMethodWith method opts sesh url payload =
+  run string sesh =<< preparePayloadMethod methodBS opts url payload
   where
     methodBS = BC8.pack method
 
diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -1,64 +1,6 @@
--- I don't know who originally wrote this, but I picked it up from
--- Edward Kmett's folds package.
-
-{-# OPTIONS_GHC -Wall #-}
 module Main (main) where
 
-import Data.List (nub)
-import Data.Version (showVersion)
-import Distribution.Package
-  (PackageName(PackageName), Package, PackageId, InstalledPackageId,
-   packageVersion, packageName)
-import Distribution.PackageDescription (PackageDescription(), TestSuite(..))
 import Distribution.Simple
-  (defaultMainWithHooks, UserHooks(..), simpleUserHooks)
-import Distribution.Simple.BuildPaths (autogenModulesDir)
-import Distribution.Simple.LocalBuildInfo
-  (withLibLBI, withTestLBI, LocalBuildInfo(),
-   ComponentLocalBuildInfo(componentPackageDeps))
-import Distribution.Simple.Setup
-  (BuildFlags(buildVerbosity), Flag(..), fromFlag,
-   HaddockFlags(haddockDistPref))
-import Distribution.Simple.Utils
-  (rewriteFile, createDirectoryIfMissingVerbose, copyFiles)
-import Distribution.Text (display)
-import Distribution.Verbosity (Verbosity, normal)
-import System.FilePath ((</>))
 
 main :: IO ()
-main = defaultMainWithHooks simpleUserHooks
-  { buildHook = \pkg lbi hooks flags -> do
-     generateBuildModule (fromFlag (buildVerbosity flags)) pkg lbi
-     buildHook simpleUserHooks pkg lbi hooks flags
-  , postHaddock = \args flags pkg lbi -> do
-     copyFiles normal (haddockOutputDir flags pkg) []
-     postHaddock simpleUserHooks args flags pkg lbi
-  }
-
-haddockOutputDir :: Package p => HaddockFlags -> p -> FilePath
-haddockOutputDir flags pkg = destDir where
-  baseDir = case haddockDistPref flags of
-    NoFlag -> "."
-    Flag x -> x
-  destDir = baseDir </> "doc" </> "html" </> display (packageName pkg)
-
-generateBuildModule :: Verbosity -> PackageDescription -> LocalBuildInfo
-                    -> IO ()
-generateBuildModule verbosity pkg lbi = do
-  let dir = autogenModulesDir lbi
-  createDirectoryIfMissingVerbose verbosity True dir
-  withLibLBI pkg lbi $ \_ libcfg -> do
-    withTestLBI pkg lbi $ \suite suitecfg -> do
-      rewriteFile (dir </> "Build_" ++ testName suite ++ ".hs") $ unlines
-        [ "module Build_" ++ testName suite ++ " where"
-        , "deps :: [String]"
-        , "deps = " ++ (show $ formatdeps (testDeps libcfg suitecfg))
-        ]
-  where
-    formatdeps = map (formatone . snd)
-    formatone p = case packageName p of
-      PackageName n -> n ++ "-" ++ showVersion (packageVersion p)
-
-testDeps :: ComponentLocalBuildInfo -> ComponentLocalBuildInfo
-         -> [(InstalledPackageId, PackageId)]
-testDeps xs ys = nub $ componentPackageDeps xs ++ componentPackageDeps ys
+main = defaultMain
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 -*- markdown -*-
 
+2017-01-09 0.5.1.0
+
+* Add Session-specific version of Network.Wreq.customPayloadMethodWith
+
+* 8.2 GHC compatibility
+
 2017-01-09 0.5.0.0
 
 * Compatible with `http-client` >= 0.5
diff --git a/examples/UploadPaste.hs b/examples/UploadPaste.hs
--- a/examples/UploadPaste.hs
+++ b/examples/UploadPaste.hs
@@ -12,11 +12,12 @@
 {-# LANGUAGE OverloadedStrings, TemplateHaskell #-}
 {-# OPTIONS_GHC -Wall #-}
 
+
 import Control.Applicative
 import Control.Lens
 import Data.Char (toLower)
 import Data.Maybe (listToMaybe)
-import Data.Monoid (mempty)
+import Data.Monoid (mempty, (<>))
 import Network.Wreq (FormParam((:=)), post, responseBody)
 import Network.Wreq.Types (FormValue(..))
 import Options.Applicative as Opts
diff --git a/tests/UnitTests.hs b/tests/UnitTests.hs
--- a/tests/UnitTests.hs
+++ b/tests/UnitTests.hs
@@ -391,8 +391,8 @@
   let go n | n >= 100 = putMVar started Nothing
            | otherwise = do
         let port = 8000 + n
-            startedUp p = putMVar started (Just ("http://localhost:" <> p))
-            mkCfg = return . setBind ("localhost") . setPort port .
+            startedUp p = putMVar started (Just ("http://0.0.0.0:" <> p))
+            mkCfg = return . setBind ("0.0.0.0") . setPort port .
                     setVerbose False .
                     setStartupHook (const (startedUp (show port)))
         serve mkCfg `E.catch` \(_::E.IOException) -> go (n+1)
diff --git a/wreq.cabal b/wreq.cabal
--- a/wreq.cabal
+++ b/wreq.cabal
@@ -1,5 +1,5 @@
 name:                wreq
-version:             0.5.0.1
+version:             0.5.1.0
 synopsis:            An easy-to-use HTTP client library.
 description:
   .
@@ -37,6 +37,7 @@
 category:            Web
 build-type:          Custom
 cabal-version:       >=1.10
+tested-with:         GHC==8.2.1, GHC==8.0.2, GHC==7.10.3, GHC==7.8.4, GHC==7.6.3, GHC==7.4.2
 extra-source-files:
   README.md
   TODO.md