diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,6 @@
+## 0.1.4.0
+* Add `Hashable` instance for the `Id` type.
+
 ## 0.1.3.0
 * New instances for `Id`:
   - `FromJSONKey`
diff --git a/license b/license
--- a/license
+++ b/license
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 Daniel Díaz Casanueva
+Copyright (c) 2024 Daniel Díaz Casanueva
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/mysql-json-table.cabal b/mysql-json-table.cabal
--- a/mysql-json-table.cabal
+++ b/mysql-json-table.cabal
@@ -1,5 +1,5 @@
 name: mysql-json-table
-version: 0.1.3.0
+version: 0.1.4.0
 category: Database
 synopsis: Using MySQL to store id-to-json tables.
 description: Visit the homepage for more information, or read the readme.
@@ -29,6 +29,7 @@
     , conduit
     , exceptions
     , http-api-data
+    , hashable
   exposed-modules: Database.MySQL.JSONTable
 
 executable mysql-json-table-test
diff --git a/src/Database/MySQL/JSONTable.hs b/src/Database/MySQL/JSONTable.hs
--- a/src/Database/MySQL/JSONTable.hs
+++ b/src/Database/MySQL/JSONTable.hs
@@ -76,6 +76,7 @@
 import Conduit (ResourceT)
 import Data.Conduit qualified as Conduit
 import Web.HttpApiData (FromHttpApiData, ToHttpApiData)
+import Data.Hashable (Hashable)
 
 -- | Open a connection to a MySQL server and apply a function to it.
 --   The connection is closed both when the function completes or throws an exception.
@@ -87,7 +88,7 @@
 --   stored in the table.
 newtype Id a = Id { fromId :: Word64 }
   deriving ( Eq, Ord, Show, ToJSON, FromJSON, FromJSONKey, ToJSONKey
-           , FromHttpApiData, ToHttpApiData)
+           , FromHttpApiData, ToHttpApiData, Hashable )
 
 instance SQL.FromField (Id a) where
   fromField = ([SQLBase.LongLong], fmap Id . readEither . CByteString.unpack)