diff --git a/hs-excelx.cabal b/hs-excelx.cabal
--- a/hs-excelx.cabal
+++ b/hs-excelx.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                hs-excelx
-version:             0.5.0.0
+version:             0.5.1.0
 synopsis:            HS-Excelx provides basic read-only access to Excel 2007 and 2010 documents in XLSX format.
 -- description:         
 license:             BSD3
diff --git a/src/Data/Excelx.hs b/src/Data/Excelx.hs
--- a/src/Data/Excelx.hs
+++ b/src/Data/Excelx.hs
@@ -40,6 +40,12 @@
                    NumericCell _ d -> d
                    _ -> 0.0
 
+instance FromCell Bool where
+    fromCell c = case valueCell c of
+                   NumericCell _ d -> d > 0.0
+                   TextCell _ t -> T.length t > 0
+                   _ -> False
+
 instance FromCell Integer where
     fromCell c = floor (fromCell c :: Double)