diff --git a/pyproject.toml b/pyproject.toml
index 6641f4c2..1d4f61e4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,9 +12,9 @@ skip = "cp36* cp37* cp38*"
 test-skip = ""
 free-threaded-support = false
 
-archs_linux = ["x86_64"]
-archs_macos = ["x86_64"]
-archs_windows = ["AMD64"]
+archs-linux = ["x86_64"]
+archs-macos = ["x86_64"]
+archs-windows = ["AMD64"]
 
 build-frontend = "default"
 config-settings = {}