diff --git a/var/spack/repos/builtin/packages/acts/package.py b/var/spack/repos/builtin/packages/acts/package.py
index 7e814342793..e9a128a486a 100644
--- a/var/spack/repos/builtin/packages/acts/package.py
+++ b/var/spack/repos/builtin/packages/acts/package.py
@@ -40,6 +40,7 @@ class Acts(CMakePackage, CudaPackage):
     # Supported Acts versions
     version("main", branch="main")
     version("master", branch="main", deprecated=True)  # For compatibility
+    version("39.0.0", commit="b055202e2fbdd509bc186eb4782714bc46f38f3f", submodules=True)
     version("38.2.0", commit="9cb8f4494656553fd9b85955938b79b2fac4c9b0", submodules=True)
     version("38.1.0", commit="8a20c88808f10bf4fcdfd7c6e077f23614c3ab90", submodules=True)
     version("38.0.0", commit="0a6b5155e29e3b755bf351b8a76067fff9b4214b", submodules=True)