diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@
 and this project adheres to
 [Haskell Package Versioning Policy](https://pvp.haskell.org/).
 
+## [1.0.5.0] - 2024-11-21
+### Added
+- Add `ToGraphQL` and `FromGraphQL` instances for `Value` and `HashMap`.
+
 ## [1.0.4.0] - 2024-10-24
 ### Added
 - `gql` quasi quoter which generates a string literal with the first line
@@ -37,6 +41,7 @@
 - JSON serialization.
 - Test helpers.
 
+[1.0.5.0]: https://git.caraus.tech/OSS/graphql-spice/compare/v1.0.4.0...v1.0.5.0
 [1.0.4.0]: https://git.caraus.tech/OSS/graphql-spice/compare/v1.0.3.0...v1.0.4.0
 [1.0.3.0]: https://git.caraus.tech/OSS/graphql-spice/compare/v1.0.2.0...v1.0.3.0
 [1.0.2.0]: https://git.caraus.tech/OSS/graphql-spice/compare/v1.0.1.0...v1.0.2.0
diff --git a/graphql-spice.cabal b/graphql-spice.cabal
--- a/graphql-spice.cabal
+++ b/graphql-spice.cabal
@@ -1,7 +1,7 @@
 cabal-version:      3.0
 
 name:               graphql-spice
-version:            1.0.4.0
+version:            1.0.5.0
 synopsis:           GraphQL with batteries
 description:        Various extensions and convenience functions for the core
                     graphql package.
@@ -38,7 +38,7 @@
       containers >= 0.6 && < 0.8,
       exceptions ^>= 0.10.4,
       hspec-expectations >= 0.8.2 && < 0.9,
-      graphql ^>= 1.3.0,
+      graphql >= 1.3.0 && < 1.5.0,
       megaparsec >= 9.0 && < 10,
       scientific ^>= 0.3.7,
       template-haskell >= 2.16 && < 3,
diff --git a/src/Language/GraphQL/Class.hs b/src/Language/GraphQL/Class.hs
--- a/src/Language/GraphQL/Class.hs
+++ b/src/Language/GraphQL/Class.hs
@@ -5,6 +5,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE TupleSections #-}
+{-# LANGUAGE FlexibleInstances #-}
 
 -- | ToGraphQL and FromGraphQL typeclasses used for user-defined type
 -- conversion.
@@ -101,6 +102,10 @@
   where
     toGraphQL :: a -> Type.Value
 
+instance ToGraphQL Type.Value
+  where
+    toGraphQL a = a
+
 instance ToGraphQL Text
   where
     toGraphQL = Type.String
@@ -198,12 +203,20 @@
   where
     toGraphQL = iso8601ToGraphQL
 
+instance ToGraphQL a => ToGraphQL (HashMap.HashMap Text a)
+  where
+    toGraphQL = Type.Object . fmap toGraphQL
+
 -- | Instances of this typeclass can be used to convert GraphQL internal
 -- representation to user-defined type.
 class FromGraphQL a
   where
     fromGraphQL :: Type.Value -> Maybe a
 
+instance FromGraphQL Type.Value
+  where
+    fromGraphQL = Just
+
 instance FromGraphQL Text
   where
     fromGraphQL (Type.String value) = Just value
@@ -310,6 +323,11 @@
 instance FromGraphQL LocalTime
   where
     fromGraphQL = fromGraphQLToISO8601
+
+instance FromGraphQL a => FromGraphQL (HashMap.HashMap Text a)
+  where
+    fromGraphQL (Type.Object hm) = traverse fromGraphQL hm
+    fromGraphQL _ = Nothing
 
 stringLE :: Name -> Q Exp
 stringLE = litE . stringL . nameBase