diff --git a/flake.nix b/flake.nix
index dd76a8b..4f2e71a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -165,8 +165,8 @@
             pkg:
             optimizeWithFlags pkg [
               "-O3"
-              "-march=znver2"
-              "-mtune=znver2"
+              "-march=znver3"
+              "-mtune=znver3"
             ];
         };
         modules =