diff --git a/var/spack/repos/builtin/packages/viennarna/package.py b/var/spack/repos/builtin/packages/viennarna/package.py
index a0420ed18fb..c492c2ba1ef 100644
--- a/var/spack/repos/builtin/packages/viennarna/package.py
+++ b/var/spack/repos/builtin/packages/viennarna/package.py
@@ -14,7 +14,9 @@ class Viennarna(AutotoolsPackage):
 
     homepage = "https://www.tbi.univie.ac.at/RNA/"
     url = "https://www.tbi.univie.ac.at/RNA/download/sourcecode/2_4_x/ViennaRNA-2.4.3.tar.gz"
+    maintainers("snehring")
 
+    version("2.6.4", sha256="d1259ce5809601a12b0dc9b724ea2c55806fece80d8d83ad417ea8a2dd574982")
     version("2.5.0", sha256="b85544650ee316743173ec9b30497cc4c559f1bfb8f66d16c563f780afd8c0c5")
     version("2.4.3", sha256="4cda6e22029b34bb9f5375181562f69e4a780a89ead50fe952891835e9933ac0")
     version("2.3.5", sha256="26b62a00da21bc5597b580ab8fef4e624234ec446d7d3cb0ce22803a5d7074ca")