diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,8 +1,12 @@
-## [*Unreleased*](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.0.6...main)
+## [*Unreleased*](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.1.0...main)
 
 None
 
-## [v0.1.0.5](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.0.5...bcp47-orphans-v0.1.0.6)
+## [v0.1.1.0](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.0.6...bcp47-orphans-v0.1.1.0)
+
+- Add `FromJSON` and `ToJSON` instances (removed from `bcp47-0.3.0.0`)
+
+## [v0.1.0.6](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.0.5...bcp47-orphans-v0.1.0.6)
 
 - Add support for Serialise and the CBOR format
 
diff --git a/bcp47-orphans.cabal b/bcp47-orphans.cabal
--- a/bcp47-orphans.cabal
+++ b/bcp47-orphans.cabal
@@ -1,6 +1,6 @@
 cabal-version:      1.12
 name:               bcp47-orphans
-version:            0.1.0.6
+version:            0.1.1.0
 license:            MIT
 license-file:       LICENSE
 copyright:          2019 Freckle Education
@@ -22,6 +22,7 @@
 
 library
     exposed-modules:
+        Data.BCP47.Aeson
         Data.BCP47.Csv
         Data.BCP47.Esqueleto
         Data.BCP47.Hashable
@@ -34,23 +35,25 @@
     other-modules:    Paths_bcp47_orphans
     default-language: Haskell2010
     build-depends:
+        aeson >=1.3.1.1,
         base >=4.7 && <5,
-        bcp47,
-        cassava,
-        errors,
-        esqueleto,
-        hashable,
-        http-api-data,
-        path-pieces,
-        persistent,
-        serialise,
-        text
+        bcp47 >=0.3.0.0,
+        cassava >=0.5.1.0,
+        errors >=2.3.0,
+        esqueleto >=3.4.0.1,
+        hashable >=1.2.7.0,
+        http-api-data >=0.3.8.1,
+        path-pieces >=0.2.1,
+        persistent >=2.11.0.1,
+        serialise >=0.2.6.0,
+        text >=1.2.3.1
 
 test-suite spec
     type:             exitcode-stdio-1.0
     main-is:          Main.hs
     hs-source-dirs:   tests
     other-modules:
+        Data.BCP47.AesonSpec
         Data.BCP47.CsvSpec
         Data.BCP47.PathPiecesSpec
         Data.BCP47.PersistSpec
@@ -60,12 +63,13 @@
 
     default-language: Haskell2010
     build-depends:
-        QuickCheck,
+        QuickCheck >=2.11.3,
+        aeson >=1.3.1.1,
         base >=4.7 && <5,
-        bcp47,
+        bcp47 >=0.3.0.0,
         bcp47-orphans,
-        cassava,
-        hspec,
-        path-pieces,
-        persistent,
-        serialise
+        cassava >=0.5.1.0,
+        hspec >=2.5.5,
+        path-pieces >=0.2.1,
+        persistent >=2.11.0.1,
+        serialise >=0.2.6.0
diff --git a/library/Data/BCP47/Aeson.hs b/library/Data/BCP47/Aeson.hs
new file mode 100644
--- /dev/null
+++ b/library/Data/BCP47/Aeson.hs
@@ -0,0 +1,14 @@
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+
+module Data.BCP47.Aeson () where
+
+import Data.Aeson
+import Data.BCP47
+import Data.Text (unpack)
+
+instance ToJSON BCP47 where
+  toEncoding = toEncoding . toText
+  toJSON = toJSON . toText
+
+instance FromJSON BCP47 where
+  parseJSON = withText "BCP47" $ either (fail . unpack) pure . fromText
diff --git a/library/Data/BCP47/Csv.hs b/library/Data/BCP47/Csv.hs
--- a/library/Data/BCP47/Csv.hs
+++ b/library/Data/BCP47/Csv.hs
@@ -3,7 +3,7 @@
 module Data.BCP47.Csv () where
 
 import Data.BCP47 (BCP47, fromText, toText)
-import Data.Csv (FromField(..), ToField(..))
+import Data.Csv (FromField (..), ToField (..))
 import Data.Text (unpack)
 
 instance ToField BCP47 where
diff --git a/library/Data/BCP47/Hashable.hs b/library/Data/BCP47/Hashable.hs
--- a/library/Data/BCP47/Hashable.hs
+++ b/library/Data/BCP47/Hashable.hs
@@ -3,7 +3,7 @@
 module Data.BCP47.Hashable () where
 
 import Data.BCP47 (BCP47, toText)
-import Data.Hashable (Hashable(..))
+import Data.Hashable (Hashable (..))
 
 instance Hashable BCP47 where
   hashWithSalt i = hashWithSalt i . toText
diff --git a/library/Data/BCP47/HttpApiData.hs b/library/Data/BCP47/HttpApiData.hs
--- a/library/Data/BCP47/HttpApiData.hs
+++ b/library/Data/BCP47/HttpApiData.hs
@@ -1,11 +1,10 @@
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 
-module Data.BCP47.HttpApiData
-  ()
+module Data.BCP47.HttpApiData ()
 where
 
 import Data.BCP47 (BCP47, fromText, toText)
-import Web.HttpApiData (FromHttpApiData(..), ToHttpApiData(..))
+import Web.HttpApiData (FromHttpApiData (..), ToHttpApiData (..))
 
 instance ToHttpApiData BCP47 where
   toUrlPiece = toText
diff --git a/library/Data/BCP47/PathPieces.hs b/library/Data/BCP47/PathPieces.hs
--- a/library/Data/BCP47/PathPieces.hs
+++ b/library/Data/BCP47/PathPieces.hs
@@ -4,7 +4,7 @@
 
 import Control.Error.Util (hush)
 import Data.BCP47 (BCP47, fromText, toText)
-import Web.PathPieces (PathPiece(..))
+import Web.PathPieces (PathPiece (..))
 
 instance PathPiece BCP47 where
   fromPathPiece = hush . fromText
diff --git a/library/Data/BCP47/Persist.hs b/library/Data/BCP47/Persist.hs
--- a/library/Data/BCP47/Persist.hs
+++ b/library/Data/BCP47/Persist.hs
@@ -1,14 +1,14 @@
-{-# OPTIONS_GHC -fno-warn-orphans #-}
 {-# LANGUAGE TypeApplications #-}
+{-# OPTIONS_GHC -fno-warn-orphans #-}
 
 module Data.BCP47.Persist () where
 
 import Control.Monad ((<=<))
 import Data.BCP47 (BCP47, fromText, toText)
-import Data.Proxy (Proxy(..))
+import Data.Proxy (Proxy (..))
 import Data.Text (Text)
-import Database.Persist.Class (PersistField(..))
-import Database.Persist.Sql (PersistFieldSql(..))
+import Database.Persist.Class (PersistField (..))
+import Database.Persist.Sql (PersistFieldSql (..))
 
 instance PersistField BCP47 where
   toPersistValue = toPersistValue . toText
diff --git a/tests/Data/BCP47/AesonSpec.hs b/tests/Data/BCP47/AesonSpec.hs
new file mode 100644
--- /dev/null
+++ b/tests/Data/BCP47/AesonSpec.hs
@@ -0,0 +1,17 @@
+{-# LANGUAGE TypeApplications #-}
+
+module Data.BCP47.AesonSpec
+  ( spec
+  ) where
+
+import Data.Aeson
+import Data.BCP47
+import Data.BCP47.Aeson ()
+import Test.Hspec
+import Test.Hspec.QuickCheck
+
+spec :: Spec
+spec = do
+  describe "ToJSON/FromJSON" $ do
+    prop "roundtrips" $ \x ->
+      decode (encode @BCP47 x) `shouldBe` Just x