diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,6 +1,11 @@
-## [*Unreleased*](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.2.0...main)
+## [*Unreleased*](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.3.0...main)
 
 None
+
+## [v0.1.3.0](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.2.0...bcp47-orphans-v0.1.3.0)
+
+- Add `ToSchema` and `ToParamSchema` instances for `BCP47`
+- Drop support for GHC 8.6
 
 ## [v0.1.2.0](https://github.com/freckle/bcp47/compare/bcp47-orphans-v0.1.1.0...bcp47-orphans-v0.1.2.0)
 
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:            0.1.2.0
+version:            0.1.3.0
 license:            MIT
 license-file:       LICENSE
 copyright:          2019 Freckle Education
@@ -28,6 +28,7 @@
         Data.BCP47.Esqueleto
         Data.BCP47.Hashable
         Data.BCP47.HttpApiData
+        Data.BCP47.OpenApi
         Data.BCP47.PathPieces
         Data.BCP47.Persist
         Data.BCP47.Serialise
@@ -36,19 +37,21 @@
     other-modules:    Paths_bcp47_orphans
     default-language: Haskell2010
     build-depends:
-        aeson >=1.4.6.0,
-        autodocodec >=0.2.3.0,
+        aeson >=1.4.7.1,
+        autodocodec >=0.4.1.0,
         base >=4.7 && <5,
         bcp47 >=0.3.0.0,
         cassava >=0.5.2.0,
         errors >=2.3.0,
-        esqueleto >=3.0.0,
-        hashable >=1.2.7.0,
+        esqueleto >=3.3.4.1,
+        hashable >=1.3.0.0,
         http-api-data >=0.4.1.1,
+        lens >=4.18.1,
+        openapi3 >=3.2.4,
         path-pieces >=0.2.1,
-        persistent >=2.9.2,
-        serialise >=0.2.2.0,
-        text >=1.2.3.1
+        persistent >=2.10.5.3,
+        serialise >=0.2.3.0,
+        text >=1.2.4.0
 
 test-suite spec
     type:             exitcode-stdio-1.0
@@ -66,12 +69,12 @@
     default-language: Haskell2010
     build-depends:
         QuickCheck >=2.13.2,
-        aeson >=1.4.6.0,
+        aeson >=1.4.7.1,
         base >=4.7 && <5,
         bcp47 >=0.3.0.0,
         bcp47-orphans,
         cassava >=0.5.2.0,
-        hspec >=2.7.1,
+        hspec >=2.7.6,
         path-pieces >=0.2.1,
-        persistent >=2.9.2,
-        serialise >=0.2.2.0
+        persistent >=2.10.5.3,
+        serialise >=0.2.3.0
diff --git a/library/Data/BCP47/OpenApi.hs b/library/Data/BCP47/OpenApi.hs
new file mode 100644
--- /dev/null
+++ b/library/Data/BCP47/OpenApi.hs
@@ -0,0 +1,36 @@
+{-# LANGUAGE DerivingVia #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TypeApplications #-}
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+
+module Data.BCP47.OpenApi () where
+
+import Control.Lens ((&), (?~))
+import Data.Aeson (Value (..))
+import Data.BCP47
+import Data.BCP47.Autodocodec ()
+import Data.OpenApi
+  ( NamedSchema (..)
+  , OpenApiType (..)
+  , ToParamSchema (..)
+  , ToSchema (..)
+  , description
+  , example
+  , format
+  , toSchema
+  , type_
+  )
+import Data.Proxy (Proxy (..))
+
+instance ToSchema BCP47 where
+  declareNamedSchema _ =
+    pure
+      $ NamedSchema (Just "BCP47")
+      $ mempty
+        & type_ ?~ OpenApiString
+        & description ?~ "BCP47 language tag"
+        & example ?~ String "en"
+        & format ?~ "bcp47"
+
+instance ToParamSchema BCP47 where
+  toParamSchema _ = toSchema $ Proxy @BCP47