diff --git a/src/Model/Amount.hs b/src/Model/Amount.hs
index d9f38c5..df13a36 100644
--- a/src/Model/Amount.hs
+++ b/src/Model/Amount.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE OverloadedStrings #-}
 module Model.Amount where
 
 import Data.Profunctor.Product (p5)
@@ -39,3 +40,4 @@ amountTable = table "amount" (
     , tableField "amounts_price"
     , tableField "amounts_verified"
     )
+  )