diff --git a/var/spack/repos/builtin/packages/cfitsio/package.py b/var/spack/repos/builtin/packages/cfitsio/package.py
index 49d71cdcab834f244a9c16760854f98e729e4002..ba457bea58d3b295e0685d3efb0f679a8fcb2f70 100644
--- a/var/spack/repos/builtin/packages/cfitsio/package.py
+++ b/var/spack/repos/builtin/packages/cfitsio/package.py
@@ -31,8 +31,9 @@ class Cfitsio(AutotoolsPackage):
     """
 
     homepage = 'http://heasarc.gsfc.nasa.gov/fitsio/'
-    url      = 'http://heasarc.gsfc.nasa.gov/FTP/software/fitsio/c/cfitsio3410.tar.gz'
+    url      = 'http://heasarc.gsfc.nasa.gov/FTP/software/fitsio/c/cfitsio3420.tar.gz'
 
+    version('3.420', '26e5c0dfb85b8d00f536e706305caa13')
     version('3.410', '8a4a66fcdd816aae41768baa0b025552')
     version('3.370', 'abebd2d02ba5b0503c633581e3bfa116')