diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 000000000..dab8e4827
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,3 @@
+[registry]
+# Requires cargo 1.100+ (stable on 2026-11-12); older cargo ignores this key.
+global-min-publish-age = "7 days"