diff --git a/var/spack/repos/builtin/packages/zlib-ng/package.py b/var/spack/repos/builtin/packages/zlib-ng/package.py
index 8444736856a..b996d3e746e 100644
--- a/var/spack/repos/builtin/packages/zlib-ng/package.py
+++ b/var/spack/repos/builtin/packages/zlib-ng/package.py
@@ -16,6 +16,7 @@ class ZlibNg(AutotoolsPackage, CMakePackage):
 
     maintainers("haampie")
 
+    version("2.1.5", sha256="3f6576971397b379d4205ae5451ff5a68edf6c103b2f03c4188ed7075fbb5f04")
     version("2.1.4", sha256="a0293475e6a44a3f6c045229fe50f69dc0eebc62a42405a51f19d46a5541e77a")
     version(
         "2.1.3",