diff --git a/var/spack/repos/builtin/packages/macsio/package.py b/var/spack/repos/builtin/packages/macsio/package.py
index c5440a2a057..53cdb14842b 100644
--- a/var/spack/repos/builtin/packages/macsio/package.py
+++ b/var/spack/repos/builtin/packages/macsio/package.py
@@ -31,10 +31,12 @@ class Macsio(CMakePackage):
     tags = ['proxy-app', 'ecp-proxy-app']
 
     homepage = "https://computation.llnl.gov/projects/co-design/macsio"
-    url      = "https://github.com/LLNL/MACSio/archive/1.0.tar.gz"
+    url      = "https://github.com/LLNL/MACSio/archive/v1.1.tar.gz"
     git      = "https://github.com/LLNL/MACSio.git"
 
     version('develop', branch='master')
+
+    version('1.1', sha256='a86249b0f10647c0b631773db69568388094605ec1a0af149d9e61e95e6961ec')
     version('1.0', '90e8e00ea84af2a47bee387ad331dbde')
 
     variant('mpi', default=True, description="Build MPI plugin")