diff --git a/Formula/jags.rb b/Formula/jags.rb
index 24d34dc28cfd7..b1c87fe110e51 100644
--- a/Formula/jags.rb
+++ b/Formula/jags.rb
@@ -1,8 +1,8 @@
 class Jags < Formula
   desc "Just Another Gibbs Sampler for Bayesian MCMC simulation"
   homepage "http://mcmc-jags.sourceforge.net"
-  url "https://downloads.sourceforge.net/project/mcmc-jags/JAGS/3.x/Source/JAGS-3.4.0.tar.gz"
-  sha256 "2beaa9a2672c2c95efc55ffa4c8b597a872f20232373daebd17ad539d3d7d82b"
+  url "https://downloads.sourceforge.net/project/mcmc-jags/JAGS/4.x/Source/JAGS-4.0.1.tar.gz"
+  sha256 "3619312cd9ce8163db4d5a51c961078061f6256382a2e93041ee22f7c09ba00e"
   bottle do
     cellar :any
     sha1 "ea59e194feb354ef474a6bd58d4556d0e68adfb0" => :yosemite
@@ -10,8 +10,6 @@ class Jags < Formula
     sha1 "49977edf0dc1571ae846f758c3ba74cf59a2f0f5" => :mountain_lion
   end
 
-  revision 1
-
   depends_on :fortran
 
   def install