diff --git a/hydra-node/src/Hydra/Party.hs b/hydra-node/src/Hydra/Party.hs
index 955cc081e79..38843778a18 100644
--- a/hydra-node/src/Hydra/Party.hs
+++ b/hydra-node/src/Hydra/Party.hs
@@ -1,5 +1,3 @@
-{-# OPTIONS_GHC -fno-warn-orphans #-}
-
 -- | Types and functions revolving around a Hydra 'Party'. That is, a
 -- participant in a Hydra Head, which signs transactions or snapshots in the
 -- Hydra protocol.
@@ -7,16 +5,11 @@ module Hydra.Party where
 
 import Hydra.Prelude hiding (show)
 
-import Data.Aeson (ToJSONKey, object, withObject, (.:), (.=))
-import qualified Data.Aeson as Aeson
+import Data.Aeson (ToJSONKey)
 import Data.Aeson.Types (FromJSONKey)
-import qualified Data.ByteString.Base16 as Base16
 import Hydra.Cardano.Api (AsType (AsVerificationKey), SerialiseAsRawBytes (deserialiseFromRawBytes, serialiseToRawBytes), SigningKey, VerificationKey, getVerificationKey, verificationKeyHash)
 import Hydra.Crypto (AsType (AsHydraKey), HydraKey)
 import qualified Hydra.Data.Party as OnChain
-import Plutus.Orphans ()
-import Plutus.V1.Ledger.Api (fromBuiltin, getPubKeyHash, toBuiltin)
-import qualified Plutus.V1.Ledger.Api as Plutus
 
 -- | Identifies a party in a Hydra head by it's 'VerificationKey'.
 newtype Party = Party {vkey :: VerificationKey HydraKey}
@@ -58,26 +51,3 @@ partyFromChain =
   maybe (fail "partyFromChain got Nothing") (pure . Party)
     . deserialiseFromRawBytes (AsVerificationKey AsHydraKey)
     . OnChain.partyToVerficationKeyBytes
-
--- * Orphans
-
-instance ToJSON Plutus.PubKeyHash where
-  toJSON = \kh ->
-    object
-      [ "tag" .= Aeson.String "PubKeyHash"
-      , "keyHash" .= Aeson.String (decodeUtf8 $ Base16.encode $ fromBuiltin $ getPubKeyHash kh)
-      ]
-
-instance FromJSON Plutus.PubKeyHash where
-  parseJSON = withObject "PubKeyHash" $ \o -> do
-    tag <- o .: "tag"
-    case tag :: Text of
-      "PubKeyHash" -> do
-        hexText :: Text <- o .: "keyHash"
-        case Base16.decode $ encodeUtf8 hexText of
-          Left e -> fail e
-          Right bs -> pure $ Plutus.PubKeyHash (toBuiltin bs)
-      _ -> fail "Expected tag to be PubKeyHash"
-
-instance Arbitrary Plutus.PubKeyHash where
-  arbitrary = genericArbitrary
diff --git a/hydra-plutus/src/Plutus/Orphans.hs b/hydra-plutus/src/Plutus/Orphans.hs
index eb040bb1769..629c811612d 100644
--- a/hydra-plutus/src/Plutus/Orphans.hs
+++ b/hydra-plutus/src/Plutus/Orphans.hs
@@ -6,16 +6,23 @@ module Plutus.Orphans where
 
 import Hydra.Prelude
 
+import Data.Aeson (object, withObject, (.:), (.=))
+import qualified Data.Aeson as Aeson
+import qualified Data.ByteString.Base16 as Base16
+import qualified Plutus.V1.Ledger.Api as Plutus
 import Plutus.V2.Ledger.Api (
   CurrencySymbol,
   POSIXTime (..),
   TokenName,
   UpperBound (..),
   Value,
+  fromBuiltin,
+  getPubKeyHash,
+  toBuiltin,
   upperBound,
  )
 import qualified PlutusTx.AssocMap as AssocMap
-import PlutusTx.Prelude (BuiltinByteString, toBuiltin)
+import PlutusTx.Prelude (BuiltinByteString)
 import Test.QuickCheck.Instances.ByteString ()
 
 instance Arbitrary BuiltinByteString where
@@ -47,3 +54,24 @@ instance FromJSON POSIXTime where
 
 instance Arbitrary a => Arbitrary (UpperBound a) where
   arbitrary = upperBound <$> arbitrary
+
+instance ToJSON Plutus.PubKeyHash where
+  toJSON = \kh ->
+    object
+      [ "tag" .= Aeson.String "PubKeyHash"
+      , "keyHash" .= Aeson.String (decodeUtf8 $ Base16.encode $ fromBuiltin $ getPubKeyHash kh)
+      ]
+
+instance FromJSON Plutus.PubKeyHash where
+  parseJSON = withObject "PubKeyHash" $ \o -> do
+    tag <- o .: "tag"
+    case tag :: Text of
+      "PubKeyHash" -> do
+        hexText :: Text <- o .: "keyHash"
+        case Base16.decode $ encodeUtf8 hexText of
+          Left e -> fail e
+          Right bs -> pure $ Plutus.PubKeyHash (toBuiltin bs)
+      _ -> fail "Expected tag to be PubKeyHash"
+
+instance Arbitrary Plutus.PubKeyHash where
+  arbitrary = genericArbitrary