diff --git a/Elm.cabal b/Elm.cabal
--- a/Elm.cabal
+++ b/Elm.cabal
@@ -1,6 +1,6 @@
 
 Name:                Elm
-Version:             0.1.1.2
+Version:             0.1.1.3
 Synopsis:            The Elm compiler and server.
 Description:         Elm aims to make client-side web-development more pleasant.
                      It is a statically/strongly typed, functional reactive
@@ -40,7 +40,8 @@
   ghc-options:	       -O3 -rtsopts -auto-all -caf-all
   Build-depends:       base >=4.2 && <5, containers >= 0.3,
                        transformers >= 0.2, mtl >= 2, parsec >= 3.1.1,
-                       blaze-html == 0.5.0.*, blaze-markup == 0.5.1.*, deepseq
+                       blaze-html == 0.5.0.*, blaze-markup == 0.5.1.*,
+                       deepseq
   
   -- Modules not exported by this package.
   -- Other-modules:       
@@ -59,7 +60,8 @@
   ghc-options:	       -O3 -rtsopts -auto-all -caf-all
   Build-depends:       base >=4.2 && <5, containers >= 0.3, transformers >= 0.2,
                        mtl >= 2, parsec >= 3.1.1, blaze-html == 0.5.0.*,
-                       HTTP >= 4000, happstack-server == 7.0.2
+                       HTTP >= 4000, happstack-server == 7.0.2,
+                       deepseq
 
 Library
   exposed-modules:     Language.Elm
diff --git a/src/Compiler.hs b/src/Compiler.hs
--- a/src/Compiler.hs
+++ b/src/Compiler.hs
@@ -10,7 +10,7 @@
 main = getArgs >>= parse
 
 parse ("--help":_) = putStrLn usage
-parse ("--version":_) = putStrLn "The Elm Compiler 0.1.1.1"
+parse ("--version":_) = putStrLn "The Elm Compiler 0.1.1.3"
 parse [loc,file]
   | "--runtime-location=" `isPrefixOf` loc =
       produceHtml (tail $ dropWhile (/='=') loc) file
diff --git a/src/Server.hs b/src/Server.hs
--- a/src/Server.hs
+++ b/src/Server.hs
@@ -11,7 +11,7 @@
 
 serve :: String -> IO ()
 serve libLoc = do
-  putStrLn "Elm Server 0.1.1.1: running at <http://localhost:8000>"
+  putStrLn "Elm Server 0.1.1.3: running at <http://localhost:8000>"
   simpleHTTP nullConf $ do
          compressedResponseFilter
          msum [ uriRest (serveElm libLoc)
@@ -31,7 +31,7 @@
 main = getArgs >>= parse
 
 parse ("--help":_) = putStrLn usage
-parse ("--version":_) = putStrLn "The Elm Server 0.1.1.1"
+parse ("--version":_) = putStrLn "The Elm Server 0.1.1.3"
 parse [] = serve "/elm-mini.js"
 parse [arg]
     | "--runtime-location=" `isPrefixOf` arg =
diff --git a/src/Types/Unify.hs b/src/Types/Unify.hs
--- a/src/Types/Unify.hs
+++ b/src/Types/Unify.hs
@@ -9,7 +9,7 @@
 import Guid
 import Types
 
-import Control.DeepSeq
+import Control.DeepSeq (NFData (..), deepseq)
 
 unify hints expr = run $ do
   cs <- constrain hints expr