diff --git a/yesod-auth/ChangeLog.md b/yesod-auth/ChangeLog.md
index dc96c5dd..2a529171 100644
--- a/yesod-auth/ChangeLog.md
+++ b/yesod-auth/ChangeLog.md
@@ -1,3 +1,7 @@
+## 1.4.18
+
+* Expose Yesod.Auth.Util.PasswordStore
+
 ## 1.4.17.3
 
 * Some translation fixes
diff --git a/yesod-auth/Yesod/Auth/Email.hs b/yesod-auth/Yesod/Auth/Email.hs
index 0c6aa34d..44990a8e 100644
--- a/yesod-auth/Yesod/Auth/Email.hs
+++ b/yesod-auth/Yesod/Auth/Email.hs
@@ -116,7 +116,7 @@ import           Yesod.Auth
 import qualified Yesod.Auth.Message       as Msg
 import           Yesod.Core
 import           Yesod.Form
-import qualified Yesod.PasswordStore      as PS
+import qualified Yesod.Auth.Util.PasswordStore as PS
 import           Control.Applicative      ((<$>), (<*>))
 import qualified Crypto.Hash              as H
 import qualified Crypto.Nonce             as Nonce
diff --git a/yesod-auth/Yesod/PasswordStore.hs b/yesod-auth/Yesod/Auth/Util/PasswordStore.hs
similarity index 97%
rename from yesod-auth/Yesod/PasswordStore.hs
rename to yesod-auth/Yesod/Auth/Util/PasswordStore.hs
index 9e32a48e..1c754732 100755
--- a/yesod-auth/Yesod/PasswordStore.hs
+++ b/yesod-auth/Yesod/Auth/Util/PasswordStore.hs
@@ -1,13 +1,8 @@
 {-# LANGUAGE OverloadedStrings, BangPatterns #-}
 {-# LANGUAGE CPP #-}
 -- |
--- Module      : Crypto.PasswordStore
--- Copyright   : (c) Peter Scott, 2011
--- License     : BSD-style
---
--- Maintainer  : pjscott@iastate.edu
--- Stability   : experimental
--- Portability : portable
+-- This is a fork of pwstore-fast, originally copyright (c) Peter Scott, 2011,
+-- and released under a BSD-style licence.
 --
 -- Securely store hashed, salted passwords. If you need to store and verify
 -- passwords, there are many wrong ways to do it, most of them all too
@@ -70,8 +65,10 @@
 -- Note that, as of version 2.4, you can also use PBKDF2, and specify the exact
 -- iteration count. This does not have a significant effect on security, but can
 -- be handy for compatibility with other code.
+--
+-- @since 1.4.18
 
-module Yesod.PasswordStore (
+module Yesod.Auth.Util.PasswordStore (
 
         -- * Algorithms
         pbkdf1,                 -- :: ByteString -> Salt -> Int -> ByteString
@@ -131,6 +128,9 @@ import Data.ByteArray (convert)
 -- key should be stored in the password file. When a user wishes to authenticate
 -- a password, just pass it and the salt to this function, and see if the output
 -- matches.
+--
+-- @since 1.4.18
+--
 pbkdf1 :: ByteString -> Salt -> Int -> ByteString
 pbkdf1 password (SaltBS salt) iter = hashRounds first_hash (iter + 1)
   where
@@ -161,6 +161,9 @@ hmacSHA256 secret msg =
 -- @32@ is the most common digest size for @SHA256@, and is
 -- what the algorithm internally uses.
 -- @HMAC+SHA256@ is used as @PRF@, because @HMAC+SHA1@ is considered too weak.
+--
+-- @since 1.4.18
+--
 pbkdf2 :: ByteString -> Salt -> Int -> ByteString
 pbkdf2 password (SaltBS salt) c =
     let hLen = 32
@@ -199,6 +202,9 @@ pbkdf2 password (SaltBS salt) c =
 -- | Generate a 'Salt' from 128 bits of data from @\/dev\/urandom@, with the
 -- system RNG as a fallback. This is the function used to generate salts by
 -- 'makePassword'.
+--
+-- @since 1.4.18
+--
 genSaltIO :: IO Salt
 genSaltIO =
     Control.Exception.catch genSaltDevURandom def
@@ -252,6 +258,9 @@ writePwHash (strength, SaltBS salt, hash) =
 -- database. Generates a salt using high-quality randomness from
 -- @\/dev\/urandom@ or (if that is not available, for example on Windows)
 -- 'System.Random', which is included in the hashed output.
+--
+-- @since 1.4.18
+--
 makePassword :: ByteString -> Int -> IO ByteString
 makePassword = makePasswordWith pbkdf1
 
@@ -260,6 +269,8 @@ makePassword = makePasswordWith pbkdf1
 --
 -- >>> makePasswordWith pbkdf1 "password" 14
 --
+-- @since 1.4.18
+--
 makePasswordWith :: (ByteString -> Salt -> Int -> ByteString)
                  -- ^ The algorithm to use (e.g. pbkdf1)
                  -> ByteString
@@ -276,6 +287,9 @@ makePasswordWith algorithm password strength = do
 -- Note that, unlike 'makePasswordWith', this function takes the @raw@
 -- number of iterations. This means the user will need to specify a
 -- sensible value, typically @10000@ or @20000@.
+--
+-- @since 1.4.18
+--
 makePasswordSaltWith :: (ByteString -> Salt -> Int -> ByteString)
                      -- ^ A function modeling an algorithm (e.g. 'pbkdf1')
                      -> (Int -> Int)
@@ -296,6 +310,9 @@ makePasswordSaltWith algorithm strengthModifier pwd salt strength = writePwHash
 --
 -- > >>> makePasswordSalt "hunter2" (makeSalt "72cd18b5ebfe6e96") 14
 -- > "sha256|14|NzJjZDE4YjVlYmZlNmU5Ng==|yuiNrZW3KHX+pd0sWy9NTTsy5Yopmtx4UYscItSsoxc="
+--
+-- @since 1.4.18
+--
 makePasswordSalt :: ByteString -> Salt -> Int -> ByteString
 makePasswordSalt = makePasswordSaltWith pbkdf1 (2^)
 
@@ -312,6 +329,8 @@ makePasswordSalt = makePasswordSaltWith pbkdf1 (2^)
 -- > >>> verifyPasswordWith pbkdf2 id "hunter2" "sha256..."
 -- > True
 --
+-- @since 1.4.18
+--
 verifyPasswordWith :: (ByteString -> Salt -> Int -> ByteString)
                    -- ^ A function modeling an algorithm (e.g. pbkdf1)
                    -> (Int -> Int)
@@ -328,6 +347,9 @@ verifyPasswordWith algorithm strengthModifier userInput pwHash =
           encode (algorithm userInput salt (strengthModifier strength)) == goodHash
 
 -- | Like 'verifyPasswordWith', but uses 'pbkdf1' as algorithm.
+--
+-- @since 1.4.18
+--
 verifyPassword :: ByteString -> ByteString -> Bool
 verifyPassword = verifyPasswordWith pbkdf1 (2^)
 
@@ -341,6 +363,9 @@ verifyPassword = verifyPasswordWith pbkdf1 (2^)
 -- This function can be used to periodically update your password database when
 -- computers get faster, in order to keep up with Moore's law. This isn't hugely
 -- important, but it's a good idea.
+--
+-- @since 1.4.18
+--
 strengthenPassword :: ByteString -> Int -> ByteString
 strengthenPassword pwHash newstr =
     case readPwHash pwHash of
@@ -355,6 +380,9 @@ strengthenPassword pwHash newstr =
                 hash = decodeLenient hashB64
 
 -- | Return the strength of a password hash.
+--
+-- @since 1.4.18
+--
 passwordStrength :: ByteString -> Int
 passwordStrength pwHash = case readPwHash pwHash of
                             Nothing               -> 0
@@ -368,12 +396,18 @@ passwordStrength pwHash = case readPwHash pwHash of
 -- hash. You can generate a salt with 'genSaltIO' or 'genSaltRandom', or if you
 -- really know what you're doing, you can create them from your own ByteString
 -- values with 'makeSalt'.
+--
+-- @since 1.4.18
+--
 newtype Salt = SaltBS ByteString
     deriving (Show, Eq, Ord)
 
 -- | Create a 'Salt' from a 'ByteString'. The input must be at least 8
 -- characters, and can contain arbitrary bytes. Most users will not need to use
 -- this function.
+--
+-- @since 1.4.18
+--
 makeSalt :: ByteString -> Salt
 makeSalt = SaltBS . encode . check_length
     where check_length salt | B.length salt < 8 =
@@ -382,17 +416,26 @@ makeSalt = SaltBS . encode . check_length
 
 -- | Convert a 'Salt' into a 'ByteString'. The resulting 'ByteString' will be
 -- base64-encoded. Most users will not need to use this function.
+--
+-- @since 1.4.18
+--
 exportSalt :: Salt -> ByteString
 exportSalt (SaltBS bs) = bs
 
 -- | Convert a raw 'ByteString' into a 'Salt'.
 -- Use this function with caution, since using a weak salt will result in a
 -- weak password.
+--
+-- @since 1.4.18
+--
 importSalt :: ByteString -> Salt
 importSalt = SaltBS
 
 -- | Is the format of a password hash valid? Attempts to parse a given password
 -- hash. Returns 'True' if it parses correctly, and 'False' otherwise.
+--
+-- @since 1.4.18
+--
 isPasswordFormatValid :: ByteString -> Bool
 isPasswordFormatValid = isJust . readPwHash
 
@@ -400,6 +443,9 @@ isPasswordFormatValid = isJust . readPwHash
 -- generator. Returns the salt and the updated random number generator. This is
 -- meant to be used with 'makePasswordSalt' by people who would prefer to either
 -- use their own random number generator or avoid the 'IO' monad.
+--
+-- @since 1.4.18
+--
 genSaltRandom :: (RandomGen b) => b -> (Salt, b)
 genSaltRandom gen = (salt, newgen)
     where rands _ 0 = []
diff --git a/yesod-auth/yesod-auth.cabal b/yesod-auth/yesod-auth.cabal
index 75339439..839a41d3 100644
--- a/yesod-auth/yesod-auth.cabal
+++ b/yesod-auth/yesod-auth.cabal
@@ -1,5 +1,5 @@
 name:            yesod-auth
-version:         1.4.17.3
+version:         1.4.18
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman, Patrick Brisbin
@@ -77,8 +77,8 @@ library
                      Yesod.Auth.GoogleEmail
                      Yesod.Auth.GoogleEmail2
                      Yesod.Auth.Hardcoded
+                     Yesod.Auth.Util.PasswordStore
     other-modules:   Yesod.Auth.Routes
-                     Yesod.PasswordStore
     ghc-options:     -Wall
 
 source-repository head