diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -38,7 +38,7 @@
         Nothing -> return Nothing
         Just v@(1,8,_) -> return $ Just $ RubyInfo v
                                                    "/usr/lib/ruby/1.8"
-                                                   ["/usr/lib/ruby/1.8/x86_64-linux"]
+                                                   ["/usr/lib/ruby/1.8/x86_64-linux","/usr/lib64/ruby/1.8/x86_64-linux"]
                                                    "/usr/lib"
                                                    "ruby1.8"
         Just v -> do
diff --git a/hruby.cabal b/hruby.cabal
--- a/hruby.cabal
+++ b/hruby.cabal
@@ -2,7 +2,7 @@
 --  see http://haskell.org/cabal/users-guide/
 
 name:                hruby
-version:             0.2.6
+version:             0.2.7
 synopsis:            Embed Ruby in your Haskell program.
 description:         Warning: this is completely experimental. Everything you need should be in "Foreign.Ruby".
 license:             BSD3
@@ -27,11 +27,11 @@
                         , aeson                == 0.7.*
                         , bytestring           >= 0.10.0.2
                         , text                 >= 0.11
-                        , attoparsec           >= 0.11 && < 0.12
+                        , attoparsec           >= 0.11 && < 0.13
                         , vector               >= 0.10 && < 0.11
                         , unordered-containers >= 0.2 && < 0.3
                         , stm                  >= 2.4 && < 2.5
-                        , scientific           == 0.2.*
+                        , scientific           >= 0.2 && < 0.4
   c-sources:            cbits/shim.c
   install-includes:     cbits/shim.h
   include-dirs:         cbits