diff --git a/src/Data/Yaml/Extra.hs b/src/Data/Yaml/Extra.hs
deleted file mode 100644
index af88d4ef8d..0000000000
--- a/src/Data/Yaml/Extra.hs
+++ /dev/null
@@ -1,27 +0,0 @@
-{-# LANGUAGE ScopedTypeVariables #-}
--- | Wrappers for Yaml functions to workaround
--- https://github.com/commercialhaskell/stack/issues/2491.
--- Import Data.Yaml.Extra in place of Data.Yaml to use this workaround.
--- Beware these functions construct/deconstruct the entire file at once!
-module Data.Yaml.Extra (decodeFileEither, encodeFile, module Data.Yaml) where
-
-import           Control.Exception
-import           Data.Yaml hiding (decodeFileEither, encodeFile)
-import qualified Data.ByteString as B
-import           System.IO
-
--- Note: we refrain from using 'B.readFile' and 'B.writeFile', as they open
--- the file in binary mode rather than text mode.
-decodeFileEither :: FromJSON a => FilePath -> IO (Either ParseException a)
-decodeFileEither path =
-  handle (\(e :: IOException) -> return . Left . OtherParseException . SomeException $ e) $
-  withFile path ReadMode $
-  \hnd -> do
-    fileContent <- B.hGetContents hnd
-    return $ decodeEither' fileContent
-
-encodeFile :: ToJSON a => FilePath -> a -> IO ()
-encodeFile path v = withFile path WriteMode $
-  \hnd -> do
-    let fileContent = encode v
-    B.hPut hnd fileContent
diff --git a/src/Stack/BuildPlan.hs b/src/Stack/BuildPlan.hs
index 34abbb9916..d4aab6da45 100644
--- a/src/Stack/BuildPlan.hs
+++ b/src/Stack/BuildPlan.hs
@@ -66,7 +66,7 @@ import qualified Data.Text as T
 import           Data.Text.Encoding (encodeUtf8)
 import qualified Data.Traversable as Tr
 import           Data.Typeable (Typeable)
-import           Data.Yaml.Extra (decodeEither', decodeFileEither)
+import           Data.Yaml (decodeEither', decodeFileEither)
 import qualified Distribution.Package as C
 import           Distribution.PackageDescription (GenericPackageDescription,
                                                   flagDefault, flagManual,
diff --git a/src/Stack/Config.hs b/src/Stack/Config.hs
index 899dc3a299..38be572b65 100644
--- a/src/Stack/Config.hs
+++ b/src/Stack/Config.hs
@@ -64,7 +64,7 @@ import           Data.Maybe
 import           Data.Monoid.Extra
 import qualified Data.Text as T
 import           Data.Text.Encoding (encodeUtf8, decodeUtf8)
-import qualified Data.Yaml.Extra as Yaml
+import qualified Data.Yaml as Yaml
 import           Distribution.System (OS (..), Platform (..), buildPlatform)
 import qualified Distribution.Text
 import           Distribution.Version (simplifyVersionRange)
diff --git a/src/Stack/ConfigCmd.hs b/src/Stack/ConfigCmd.hs
index 2012f56179..bd600d5d73 100644
--- a/src/Stack/ConfigCmd.hs
+++ b/src/Stack/ConfigCmd.hs
@@ -23,7 +23,7 @@ import qualified Data.HashMap.Strict as HMap
 import           Data.Monoid
 import           Data.Text (Text)
 import qualified Data.Text as T
-import qualified Data.Yaml.Extra as Yaml
+import qualified Data.Yaml as Yaml
 import qualified Options.Applicative as OA
 import qualified Options.Applicative.Types as OA
 import           Path
diff --git a/src/Stack/Solver.hs b/src/Stack/Solver.hs
index c28473a5ca..2402d46ece 100644
--- a/src/Stack/Solver.hs
+++ b/src/Stack/Solver.hs
@@ -54,7 +54,7 @@ import           Data.Text.Extra (stripCR)
 import qualified Data.Text.Lazy as LT
 import           Data.Text.Lazy.Encoding (decodeUtf8With)
 import           Data.Tuple (swap)
-import qualified Data.Yaml.Extra as Yaml
+import qualified Data.Yaml as Yaml
 import qualified Distribution.Package as C
 import qualified Distribution.PackageDescription as C
 import qualified Distribution.Text as C
diff --git a/stack-7.8.yaml b/stack-7.8.yaml
index ce5994ca46..03125701d3 100644
--- a/stack-7.8.yaml
+++ b/stack-7.8.yaml
@@ -76,6 +76,7 @@ extra-deps:
 - text-metrics-0.1.0
 - pid1-0.1.0.0
 - file-embed-0.0.10
+- yaml-0.8.20
 flags:
   time-locale-compat:
     old-locale: false
diff --git a/stack.cabal b/stack.cabal
index e9f5b432c0..db135efab7 100644
--- a/stack.cabal
+++ b/stack.cabal
@@ -68,7 +68,6 @@ library
                      Data.Monoid.Extra
                      Data.Store.VersionTagged
                      Data.Text.Extra
-                     Data.Yaml.Extra
                      Distribution.Version.Extra
                      Network.HTTP.Download
                      Network.HTTP.Download.Verified
@@ -257,7 +256,7 @@ library
                    , unordered-containers >= 0.2.5.1
                    , vector >= 0.10.12.3 && < 0.12
                    , vector-binary-instances
-                   , yaml >= 0.8.10.1
+                   , yaml >= 0.8.20
                    , zlib >= 0.5.4.2 && < 0.7
                    , deepseq >= 1.4
                    , hastache