diff --git a/setup.cfg b/setup.cfg
index 2480439..bd402ac 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -18,7 +18,7 @@ package_dir =
     =src
 packages = find:
 install_requires =
-    isal>=1.0.0; platform.python_implementation == 'CPython' and (platform.machine == "x86_64" or platform.machine == "AMD64")
+    isal>=1.0.0; platform.machine == "x86_64" or platform.machine == "AMD64" or platform.machine == "aarch64"
     typing_extensions; python_version<'3.8'
 
 [options.packages.find]