diff --git a/DSH.cabal b/DSH.cabal
--- a/DSH.cabal
+++ b/DSH.cabal
@@ -1,5 +1,5 @@
 Name:                DSH
-Version:             0.4.0.1
+Version:             0.4.1
 Synopsis:            Database Supported Haskell
 Description:
   This is a Haskell library for database-supported program execution. Using
@@ -56,7 +56,7 @@
                      array              >= 0.3,
                      syb                >= 0.1,
                      mtl                >= 2.0.1,
-                     bytestring         >= 0.9.1.7,
+                     bytestring         >= 0.9,
                      text               >= 0.10,
                      HDBC               >= 2.2,
                      convertible        >= 1.0,
@@ -64,7 +64,7 @@
                      haskell-src-exts   >= 1.9,
                      syntax-trees       >= 0.1.2,
                      HaXml              >= 1.20,
-                     csv                >= 0.1.2,
+                     csv                >= 0.1,
                      Pathfinder         >= 0.4,
                      FerryCore          >= 0.4
 
diff --git a/src/Database/DSH/Data.hs b/src/Database/DSH/Data.hs
--- a/src/Database/DSH/Data.hs
+++ b/src/Database/DSH/Data.hs
@@ -433,7 +433,7 @@
           (SqlString (c : _), CharT) -> Right $ CharN c CharT
           (SqlByteString ((T.unpack . T.decodeUtf8) -> (c : _)), CharT)  -> Right $ CharN c CharT
 
-          _                        -> error (show sql) 
+          _                        -> error (show sql) -- $impossible
 
 instance Convertible Norm SqlValue where
     safeConvert n =