diff --git a/canteven-listen-http.cabal b/canteven-listen-http.cabal
--- a/canteven-listen-http.cabal
+++ b/canteven-listen-http.cabal
@@ -1,5 +1,5 @@
 name:                canteven-listen-http
-version:             0.1.0.0
+version:             1.0.0.1
 synopsis:            data types to describe HTTP services
 description:
   A few datatypes useful for describing what ports an HTTP service listens on.
@@ -22,7 +22,7 @@
   -- other-modules:
   other-extensions:    DeriveGeneric, NamedFieldPuns, OverloadedStrings
   build-depends:
-    base >=4.7 && <4.8,
-    aeson >= 0.8.0.0 && <0.11
+    aeson >= 0.11 && <0.12,
+    base >= 4.8 && < 4.10
   hs-source-dirs:      src
   default-language:    Haskell2010
diff --git a/src/Canteven/Listen/HTTP.hs b/src/Canteven/Listen/HTTP.hs
--- a/src/Canteven/Listen/HTTP.hs
+++ b/src/Canteven/Listen/HTTP.hs
@@ -10,11 +10,10 @@
     ) where
 
 import Data.Aeson (FromJSON(parseJSON), withObject, (.:))
-import Data.Functor ((<$>))
 import GHC.Generics (Generic)
 
 -- | Toplevel type to parse listeners out of a config file.
-data ListenHTTPConfig =
+newtype ListenHTTPConfig =
     ListenHTTPConfig {
         listeners :: [ListenerConfig]
     } deriving (Generic)