diff --git a/Network/Captcha/ReCaptcha.hs b/Network/Captcha/ReCaptcha.hs
--- a/Network/Captcha/ReCaptcha.hs
+++ b/Network/Captcha/ReCaptcha.hs
@@ -51,7 +51,7 @@
               , textarea ! [name "recaptcha_challenge_field", rows "3", cols "40"] << noHtml
               , input ! [thetype "hidden", name "recaptcha_response_field", value "manual_challenge"]
               ]
-  where captchaURL s = "http://api.recaptcha.net/" ++ s ++ "?k=" ++ recaptchaPublicKey ++
+  where captchaURL s = "https://www.google.com/recaptcha/api/" ++ s ++ "?k=" ++ recaptchaPublicKey ++
           case mbErrorMsg of
                Just e  -> "?error=" ++ e
                Nothing -> ""
@@ -63,7 +63,7 @@
                 -> String                 -- ^ value of the recaptcha_response_field
                 -> IO (Either String ())  -- ^ @Left@ error message, or @Right ()@ for success
 validateCaptcha recaptchaPrivateKey ipaddress challenge response = do
-  let verifyURIString = "http://api-verify.recaptcha.net/verify"
+  let verifyURIString = "https://www.google.com/recaptcha/api/verify"
   let verifyURI = case parseURI verifyURIString of
                        Just uri  -> uri
                        Nothing   -> error $ "Could not parse URI: " ++ verifyURIString
diff --git a/recaptcha.cabal b/recaptcha.cabal
--- a/recaptcha.cabal
+++ b/recaptcha.cabal
@@ -1,6 +1,6 @@
 Name:            recaptcha
-Version:         0.1
-Cabal-Version:   >= 1.2
+Version:         0.1.0.1
+Cabal-Version:   >= 1.6
 Build-Type:      Custom
 License:         BSD3
 License-File:    LICENSE
@@ -15,11 +15,14 @@
 Description:     reCAPTCHA (http://recaptcha.net/) is a service that provides
                  captchas for preventing automated spam in web applications.
                  recaptcha-hs provides functions for using reCAPTCHA in Haskell
-                 web applications. 
+                 web applications.
+Source-repository head
+  type:          git
+  location:      git://github.com/jgm/recaptcha.git
 Library
-  Build-Depends: base, HTTP >= 3001.1.4, xhtml >= 3000.0, network >= 2.2.0.1
+  Build-Depends: base < 5, HTTP >= 3001.1.4, xhtml >= 3000.0, network >= 2.2.0.1
   Hs-Source-Dirs:  .
   Exposed-Modules: Network.Captcha.ReCaptcha
-  Ghc-Options:     -Wall -threaded
+  Ghc-Options:     -Wall
   Ghc-Prof-Options: -auto-all