diff --git a/servant-purescript.cabal b/servant-purescript.cabal
--- a/servant-purescript.cabal
+++ b/servant-purescript.cabal
@@ -1,5 +1,5 @@
 name:                servant-purescript
-version:             0.3.1.4
+version:             0.3.1.5
 synopsis:            Generate PureScript accessor functions for you servant API
 description:         Please see README.md
 homepage:            https://github.com/eskimor/servant-purescript#readme
diff --git a/src/Servant/PureScript.hs b/src/Servant/PureScript.hs
--- a/src/Servant/PureScript.hs
+++ b/src/Servant/PureScript.hs
@@ -107,9 +107,9 @@
 -- | Use this function for implementing 'parseHeader' in your FromHttpApiData instances
 --   in order to be compatible with the generated PS code.
 jsonParseHeader :: FromJSON a => ByteString -> Either Text a
-jsonParseHeader = first T.pack . eitherDecodeStrict . urlDecode True
+jsonParseHeader = first T.pack . eitherDecodeStrict . urlDecode False
 
 -- | Use this function for implementing 'toHeader' in your ToHttpApiData instances
 --   in order to be compatible with the generated PS code.
 jsonToHeader :: ToJSON a => a -> ByteString
-jsonToHeader = urlEncode True . BS.toStrict . encode
+jsonToHeader = urlEncode False . BS.toStrict . encode