diff --git a/Data/ByteString/Nums/Careless/Float.hs b/Data/ByteString/Nums/Careless/Float.hs
--- a/Data/ByteString/Nums/Careless/Float.hs
+++ b/Data/ByteString/Nums/Careless/Float.hs
@@ -2,6 +2,7 @@
 
 {-# LANGUAGE MultiParamTypeClasses
            , TypeSynonymInstances
+           , FlexibleInstances
   #-}
 
 
diff --git a/Data/ByteString/Nums/Careless/Hex.hs b/Data/ByteString/Nums/Careless/Hex.hs
--- a/Data/ByteString/Nums/Careless/Hex.hs
+++ b/Data/ByteString/Nums/Careless/Hex.hs
@@ -2,6 +2,7 @@
 
 {-# LANGUAGE MultiParamTypeClasses
            , TypeSynonymInstances
+           , FlexibleInstances
   #-}
 
 
diff --git a/Data/ByteString/Nums/Careless/Int.hs b/Data/ByteString/Nums/Careless/Int.hs
--- a/Data/ByteString/Nums/Careless/Int.hs
+++ b/Data/ByteString/Nums/Careless/Int.hs
@@ -2,6 +2,7 @@
 
 {-# LANGUAGE MultiParamTypeClasses
            , TypeSynonymInstances
+           , FlexibleInstances
   #-}
 
 
diff --git a/bytestring-nums.cabal b/bytestring-nums.cabal
--- a/bytestring-nums.cabal
+++ b/bytestring-nums.cabal
@@ -1,5 +1,5 @@
 name                          : bytestring-nums
-version                       : 0.3.2
+version                       : 0.3.3
 category                      : Text
 license                       : BSD3
 license-file                  : LICENSE