diff --git a/autodocodec-swagger2.cabal b/autodocodec-swagger2.cabal
--- a/autodocodec-swagger2.cabal
+++ b/autodocodec-swagger2.cabal
@@ -1,11 +1,11 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.34.7.
+-- This file has been generated from package.yaml by hpack version 0.36.0.
 --
 -- see: https://github.com/sol/hpack
 
 name:           autodocodec-swagger2
-version:        0.0.1.1
+version:        0.0.1.2
 synopsis:       Autodocodec interpreters for swagger2
 homepage:       https://github.com/NorfairKing/autodocodec#readme
 bug-reports:    https://github.com/NorfairKing/autodocodec/issues
@@ -34,7 +34,7 @@
       src
   build-depends:
       aeson
-    , autodocodec >=0.2.0.0
+    , autodocodec >=0.3.0.0
     , base >=4.7 && <5
     , insert-ordered-containers
     , scientific
diff --git a/src/Autodocodec/Swagger/Schema.hs b/src/Autodocodec/Swagger/Schema.hs
--- a/src/Autodocodec/Swagger/Schema.hs
+++ b/src/Autodocodec/Swagger/Schema.hs
@@ -22,7 +22,7 @@
 import Data.Text (Text)
 
 -- | Use a type's 'codec' to implement 'declareNamedSchema'.
-declareNamedSchemaViaCodec :: HasCodec value => Proxy value -> Declare (Definitions Schema) NamedSchema
+declareNamedSchemaViaCodec :: (HasCodec value) => Proxy value -> Declare (Definitions Schema) NamedSchema
 declareNamedSchemaViaCodec proxy = declareNamedSchemaVia codec proxy
 
 -- | Use a given 'codec' to implement 'declareNamedSchema'.
@@ -160,7 +160,7 @@
                     }
               }
           ]
-      OptionalKeyWithOmittedDefaultCodec key vs defaultValue mDoc -> goObject (OptionalKeyWithDefaultCodec key vs defaultValue mDoc)
+      OptionalKeyWithOmittedDefaultCodec key vs defaultValue mDoc -> goObject (optionalKeyWithDefaultCodec key vs defaultValue mDoc)
       PureCodec _ -> pure []
       EitherCodec u oc1 oc2 -> do
         ss1 <- goObject oc1