diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,13 @@
 # Changelog for password-instances
 
+## 0.3.0.0
+
+- Added instance for `PersistFieldSql` for `PassHash`.
+
+## 0.2.0.0
+
+- Added instance for `PersistField` for `PassHash`.
+
 ## 0.1.0.0
 
 - Initial version.
diff --git a/password-instances.cabal b/password-instances.cabal
--- a/password-instances.cabal
+++ b/password-instances.cabal
@@ -1,7 +1,7 @@
 cabal-version: 1.12
 
 name:           password-instances
-version:        0.2.0.0
+version:        0.3.0.0
 category:       Data
 synopsis:       typeclass instances for password package
 description:    A library providing typeclass instances for common libraries for the types from the password package.
diff --git a/src/Data/Password/Instances.hs b/src/Data/Password/Instances.hs
--- a/src/Data/Password/Instances.hs
+++ b/src/Data/Password/Instances.hs
@@ -44,6 +44,7 @@
 import Data.Aeson (FromJSON)
 import Data.Password
 import Database.Persist.Class (PersistField)
+import Database.Persist.Sql (PersistFieldSql)
 import Web.HttpApiData (FromHttpApiData)
 
 
@@ -95,3 +96,7 @@
 -- We don't provide an instance of 'PersistField' for 'Pass', because we don't
 -- want to make it easy to store a plain-text password in the database.
 deriving newtype instance PersistField PassHash
+
+-- | This instance allows a 'PassHash' to be stored as a field in an SQL
+-- database in "Database.Persist.Sql".
+deriving newtype instance PersistFieldSql PassHash