diff --git a/Storage/Hashed/Monad.hs b/Storage/Hashed/Monad.hs
index 67287b4..bf8ad38 100644
--- a/Storage/Hashed/Monad.hs
+++ b/Storage/Hashed/Monad.hs
@@ -1,2 +1,3 @@
 {-# LANGUAGE ScopedTypeVariables, BangPatterns, TypeSynonymInstances, UndecidableInstances, FlexibleInstances #-}
+{-# LANGUAGE FlexibleContexts #-}