diff --git a/var/spack/repos/builtin/packages/mothur/package.py b/var/spack/repos/builtin/packages/mothur/package.py
index 4c32475552..8fd771c0d1 100644
--- a/var/spack/repos/builtin/packages/mothur/package.py
+++ b/var/spack/repos/builtin/packages/mothur/package.py
@@ -33,6 +33,7 @@ class Mothur(MakefilePackage):
     homepage = "https://github.com/mothur/mothur"
     url      = "https://github.com/mothur/mothur/archive/v1.39.5.tar.gz"
 
+    version('1.40.5', 'd57847849fdb961c3f66c9b9fdf3057b')
     version('1.39.5', '1f826ea4420e6822fc0db002c5940b92')
 
     variant('mpi', default=True, description='Enable MPI parallel support')