diff --git a/config/remote_cargo/crates-io.yaml b/config/remote_cargo/crates-io.yaml
new file mode 100644
index 0000000..818ff4c
--- /dev/null
+++ b/config/remote_cargo/crates-io.yaml
@@ -0,0 +1,6 @@
+base_url: https://index.crates.io
+description: "crates.io — public Rust crate sparse index"
+immutable_ttl: 0
+mutable_ttl: 300
+check_mutable: true
+stale_on_error: true