diff --git a/src/Main.hs b/src/Main.hs
index 7609acd..19aae0a 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -7,6 +7,7 @@ import Json
 import Control.Lens
 import Control.Monad               (when)
 import Network.Wreq                (get, responseBody)
+import Data.Monoid
 import Data.Aeson                  (decode, toJSON)
 import Data.Maybe                  (fromJust)
 import Data.HashMap.Strict         (delete)