diff --git a/Library/Formula/sundials.rb b/Library/Formula/sundials.rb
index 2411d72b8ec2..15aa011d3599 100644
--- a/Library/Formula/sundials.rb
+++ b/Library/Formula/sundials.rb
@@ -1,9 +1,9 @@
 require 'formula'
 
 class Sundials < Formula
-  url 'https://computation.llnl.gov/casc/sundials/download/code/sundials-2.4.0.tar.gz'
   homepage 'https://computation.llnl.gov/casc/sundials/main.html'
-  md5 '4dbe9b98e66cf7670f42ecb73bf8216e'
+  url 'https://computation.llnl.gov/casc/sundials/download/code/sundials-2.5.0.tar.gz'
+  sha1 '9affcc525269e80c8ec6ae1db1e0a0ff201d07e0'
 
   def install
     system "./configure", "--disable-debug", "--disable-dependency-tracking",