diff --git a/Formula/arpack.rb b/Formula/arpack.rb
index f0e858997d..15c67e8419 100644
--- a/Formula/arpack.rb
+++ b/Formula/arpack.rb
@@ -1,9 +1,8 @@
 class Arpack < Formula
   desc "Routines to solve large scale eigenvalue problems"
   homepage "https://github.com/opencollab/arpack-ng"
-  url "https://github.com/opencollab/arpack-ng/archive/3.5.0.tar.gz"
-  sha256 "50f7a3e3aec2e08e732a487919262238f8504c3ef927246ec3495617dde81239"
-  revision 2
+  url "https://github.com/opencollab/arpack-ng/archive/3.6.0.tar.gz"
+  sha256 "3c88e74cc10bba81dc2c72c4f5fff38a800beebaa0b4c64d321c28c9203b37ea"
   head "https://github.com/opencollab/arpack-ng.git"
 
   bottle do