diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+0.5.4.0
+=======
+
+* Bump versions for `servant-0.16` and `swagger-2.4`.
+
 0.5.3.0
 =======
 
diff --git a/servant-auth-token-api.cabal b/servant-auth-token-api.cabal
--- a/servant-auth-token-api.cabal
+++ b/servant-auth-token-api.cabal
@@ -1,7 +1,8 @@
 name:                servant-auth-token-api
-version:             0.5.3.0
+version:             0.5.4.0
 synopsis:            Servant based API for token based authorisation
-description:         Please see README.md
+description:         The package provides cross compiler API (for GHC and GHCJS) for
+                     <http://hackage.haskell.org/package/servant-auth-token servant-auth-token>. Please see README.md
 homepage:            https://github.com/ncrashed/servant-auth-token-api#readme
 license:             BSD3
 license-file:        LICENSE
@@ -14,6 +15,7 @@
   README.md
   CHANGELOG.md
 cabal-version:       >=1.10
+tested-with:         GHC ==8.6.5, GHC ==8.4.4
 
 Flag flat-perm-symbols
   Description: Use flat Symbols for token tags, improve compilation time.
@@ -28,14 +30,14 @@
     Servant.API.Auth.Token.Internal.Schema
   build-depends:
       base            >= 4.7    && < 5
-    , aeson           >= 0.11   && < 1.4
+    , aeson           >= 0.11   && < 1.5
     , aeson-injector  >= 1.0.4  && < 1.2
     , lens            >= 4.13   && < 5
     , raw-strings-qq  >= 1.1    && < 1.2
-    , servant         >= 0.9    && < 0.15
+    , servant         >= 0.9    && < 0.17
     , servant-docs    >= 0.9    && < 0.15
     , servant-swagger >= 1.1    && < 1.2
-    , swagger2        >= 2.1    && < 2.3
+    , swagger2        >= 2.4    && < 2.5
     , text            >= 1.2    && < 2
 
   default-language:    Haskell2010
diff --git a/src/Servant/API/Auth/Token.hs b/src/Servant/API/Auth/Token.hs
--- a/src/Servant/API/Auth/Token.hs
+++ b/src/Servant/API/Auth/Token.hs
@@ -175,7 +175,7 @@
 type Token' (perms :: [Symbol]) = Token (PlainPerms perms)
 
 instance ToParamSchema (Token perms) where
-  toParamSchema _ = mempty { _paramSchemaType = SwaggerString }
+  toParamSchema _ = mempty { _paramSchemaType = Just SwaggerString }
 
 instance FromHttpApiData (Token perms) where
   parseUrlPiece = fmap Token . parseUrlPiece