diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+## [1.2.0] - 2024-03-18
+
+### Added
+- Prerequisite traits (#37)
+
 ## [1.1.1] - 2024-01-01
 
 ### Changed
@@ -47,7 +52,8 @@
 ### Added
 - First version of webgear-openapi
 
-[Unreleased]: https://github.com/haskell-webgear/webgear/compare/v1.1.1...HEAD
+[Unreleased]: https://github.com/haskell-webgear/webgear/compare/v1.2.0...HEAD
+[1.2.0]: https://github.com/haskell-webgear/webgear/releases/tag/v1.2.0
 [1.1.1]: https://github.com/haskell-webgear/webgear/releases/tag/v1.1.1
 [1.1.0]: https://github.com/haskell-webgear/webgear/releases/tag/v1.1.0
 [1.0.5]: https://github.com/haskell-webgear/webgear/releases/tag/v1.0.5
diff --git a/src/WebGear/OpenApi/Trait/Auth.hs b/src/WebGear/OpenApi/Trait/Auth.hs
new file mode 100644
--- /dev/null
+++ b/src/WebGear/OpenApi/Trait/Auth.hs
@@ -0,0 +1,26 @@
+{-# OPTIONS_GHC -Wno-orphans #-}
+{-# OPTIONS_GHC -Wno-unused-imports #-}
+
+-- | Functions and instances for authentication
+module WebGear.OpenApi.Trait.Auth () where
+
+import Control.Lens ((?~))
+import Data.Function ((&))
+import Data.OpenApi (
+  Definitions,
+  HasType (type_),
+  NamedSchema,
+  Schema,
+  ToParamSchema (..),
+  ToSchema (..),
+  paramSchemaToSchema,
+ )
+import Data.OpenApi.Declare (Declare)
+import Data.OpenApi.Internal.Schema (plain)
+import Data.Proxy (Proxy (..))
+import GHC.TypeLits (KnownSymbol)
+import WebGear.Core.Trait.Auth.Common (AuthToken)
+
+instance (KnownSymbol scheme) => ToSchema (AuthToken scheme) where
+  declareNamedSchema :: Proxy (AuthToken scheme) -> Declare (Definitions Schema) NamedSchema
+  declareNamedSchema _ = declareNamedSchema $ Proxy @String
diff --git a/src/WebGear/OpenApi/Trait/Auth/Basic.hs b/src/WebGear/OpenApi/Trait/Auth/Basic.hs
--- a/src/WebGear/OpenApi/Trait/Auth/Basic.hs
+++ b/src/WebGear/OpenApi/Trait/Auth/Basic.hs
@@ -1,6 +1,6 @@
 {-# OPTIONS_GHC -Wno-orphans #-}
 
--- | OpenApi implementation of 'BasicAuth'' trait.
+-- | OpenApi implementation of `BasicAuth'` trait.
 module WebGear.OpenApi.Trait.Auth.Basic where
 
 import Data.OpenApi
diff --git a/src/WebGear/OpenApi/Trait/Cookie.hs b/src/WebGear/OpenApi/Trait/Cookie.hs
--- a/src/WebGear/OpenApi/Trait/Cookie.hs
+++ b/src/WebGear/OpenApi/Trait/Cookie.hs
@@ -1,6 +1,6 @@
 {-# OPTIONS_GHC -Wno-orphans #-}
 
--- | OpenApi implementation of 'Cookie' and 'SetCookie' traits.
+-- | OpenApi implementation of 'WG.Cookie' and 'WG.SetCookie' traits.
 module WebGear.OpenApi.Trait.Cookie () where
 
 import Data.OpenApi hiding (Response)
diff --git a/src/WebGear/OpenApi/Traits.hs b/src/WebGear/OpenApi/Traits.hs
--- a/src/WebGear/OpenApi/Traits.hs
+++ b/src/WebGear/OpenApi/Traits.hs
@@ -5,6 +5,7 @@
 -}
 module WebGear.OpenApi.Traits () where
 
+import WebGear.OpenApi.Trait.Auth ()
 import WebGear.OpenApi.Trait.Auth.Basic ()
 import WebGear.OpenApi.Trait.Auth.JWT ()
 import WebGear.OpenApi.Trait.Body ()
diff --git a/webgear-openapi.cabal b/webgear-openapi.cabal
--- a/webgear-openapi.cabal
+++ b/webgear-openapi.cabal
@@ -1,7 +1,7 @@
 cabal-version:       2.4
 
 name:                webgear-openapi
-version:             1.1.1
+version:             1.2.0
 synopsis:            Composable, type-safe library to build HTTP API servers
 description:
     WebGear is a library to for building composable, type-safe HTTP API servers.
@@ -29,6 +29,7 @@
   exposed-modules:    WebGear.OpenApi
                     , WebGear.OpenApi.Handler
                     , WebGear.OpenApi.Traits
+                    , WebGear.OpenApi.Trait.Auth
                     , WebGear.OpenApi.Trait.Auth.Basic
                     , WebGear.OpenApi.Trait.Auth.JWT
                     , WebGear.OpenApi.Trait.Body
@@ -69,14 +70,14 @@
                       TypeFamilies
                       TypeOperators
   build-depends:      arrows ==0.4.*
-                    , base >=4.13.0.0 && <4.19
+                    , base >=4.13.0.0 && <4.20
                     , http-media ==0.8.*
                     , http-types ==0.12.*
                     , insert-ordered-containers ==0.2.*
                     , lens >=4.18.1 && <5.3
                     , openapi3 >=3.1.0 && <3.3
                     , text >=1.2.0.0 && <2.2
-                    , webgear-core ^>=1.1.1
+                    , webgear-core ^>=1.2.0
   ghc-options:        -Wall
                       -Wno-unticked-promoted-constructors
                       -Wcompat