diff --git a/src/Data/Yaml/YamlLight/Lens.hs b/src/Data/Yaml/YamlLight/Lens.hs
--- a/src/Data/Yaml/YamlLight/Lens.hs
+++ b/src/Data/Yaml/YamlLight/Lens.hs
@@ -12,8 +12,8 @@
 import Control.Lens
 import Data.ByteString (ByteString)
 import qualified Data.ByteString.Char8 as BC
-import Data.ByteString.Lex.Integral
-import Data.ByteString.Lex.Double
+import qualified Data.ByteString.Lex.Integral as I
+import qualified Data.ByteString.Lex.Fractional as F
 import Data.Map (Map)
 import qualified Data.Map as Map
 import Data.Traversable (sequenceA)
@@ -62,12 +62,12 @@
 
 -- | Try to parse an 'Integral' value from a 'YamlLight'.
 yamlInt :: Integral b => YamlLight -> Maybe b
-yamlInt (YStr s) = readSigned readDecimal s >>= noRemainder
+yamlInt (YStr s) = I.readSigned I.readDecimal s >>= noRemainder
 yamlInt _ = Nothing
 
--- | Try to parse a 'Double' from a 'YamlLight'.
-yamlReal :: YamlLight -> Maybe Double
-yamlReal (YStr s) = readDouble s >>= noRemainder
+-- | Try to parse a 'Fractional' value from a 'YamlLight'.
+yamlReal :: Fractional b => YamlLight -> Maybe b
+yamlReal (YStr s) = F.readSigned F.readDecimal s >>= noRemainder
 yamlReal _ = Nothing
 
 -- | Lens into a sequence.
@@ -125,14 +125,14 @@
   fromYaml x@(YStr _) = yamlInt x
   fromYaml _ = Nothing
   toYaml x = YStr $ if x < 0 then BC.cons '-' bs else bs
-    where Just bs = packDecimal $ abs x
+    where Just bs = I.packDecimal $ abs x
   -- toYaml = YStr . BC.pack . show
 
 instance AsYaml Integer where
   fromYaml x@(YStr _) = yamlInt x
   fromYaml _ = Nothing
   toYaml x = YStr $ if x < 0 then BC.cons '-' bs else bs
-    where Just bs = packDecimal $ abs x
+    where Just bs = I.packDecimal $ abs x
   -- toYaml = YStr . BC.pack . show
 
 instance AsYaml Double where
diff --git a/yaml-light-lens.cabal b/yaml-light-lens.cabal
--- a/yaml-light-lens.cabal
+++ b/yaml-light-lens.cabal
@@ -1,5 +1,5 @@
 name:                yaml-light-lens
-version:             0.3.1.10
+version:             0.3.2
 synopsis:            Lens interface to yaml-light.
 description:         Lenses for working with YAML documents.
 license:             BSD3
@@ -20,7 +20,7 @@
   exposed-modules:     Data.Yaml.YamlLight.Lens
   build-depends:       base >= 4.5 && < 5,
                        bytestring,
-                       bytestring-lexing >= 0.4.3,
+                       bytestring-lexing >= 0.5.0.2 && < 0.6,
                        containers,
                        lens >= 4.0 && < 4.12,
                        yaml-light >= 0.1 && < 0.2
@@ -36,7 +36,7 @@
 test-suite doctests
   type:           exitcode-stdio-1.0
   main-is:        doctests.hs
-  ghc-options:    -Wall -Werror -threaded
+  ghc-options:    -Wall -threaded
   hs-source-dirs: tests
   default-language:    Haskell2010
   build-depends: