diff --git a/var/spack/repos/builtin/packages/nco/package.py b/var/spack/repos/builtin/packages/nco/package.py
index 3edca017cc..7e52380f62 100644
--- a/var/spack/repos/builtin/packages/nco/package.py
+++ b/var/spack/repos/builtin/packages/nco/package.py
@@ -30,8 +30,9 @@ class Nco(AutotoolsPackage):
     netCDF-accessible formats"""
 
     homepage = "http://nco.sourceforge.net/"
-    url      = "https://github.com/nco/nco/archive/4.6.5.tar.gz"
+    url      = "https://github.com/nco/nco/archive/4.6.6.tar.gz"
 
+    version('4.6.6', 'df6fa47aaf6e41adfc0631912a7a341f')
     version('4.6.5', '2afd34a6bb5ff6c7ed39cf40c917b6e4')
     version('4.6.4', '22f4e779d0011a9c0db90fda416c8e45')
     version('4.6.3', '0e1d6616c65ed3a30c54cc776da4f987')