diff --git a/WeatherApi.hs b/WeatherApi.hs
--- a/WeatherApi.hs
+++ b/WeatherApi.hs
@@ -59,7 +59,7 @@
                        , condition     :: String
                        } deriving (Eq, Show)
 
-data ApiError    = NotFoundError String | NetworkError String
+data ApiError    = NotFoundError String | NetworkError String deriving Show
 type ApiResponse = Either ApiError Weather
 
 mkWeatherHandler c@(Config apiHost apiPort queryFun) =
diff --git a/weather-api.cabal b/weather-api.cabal
--- a/weather-api.cabal
+++ b/weather-api.cabal
@@ -1,5 +1,5 @@
 Name:              weather-api
-Version:           0.1.0
+Version:           0.2.0
 Synopsis:          Weather api implemented in haskell
 Description:
         This library implement generic api for retrieving weather