diff --git a/crates/chan/RUSTSEC-0000-0000.toml b/crates/chan/RUSTSEC-0000-0000.toml
new file mode 100644
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+++ b/crates/chan/RUSTSEC-0000-0000.toml
@@ -0,0 +1,17 @@
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "chan"
+title = "chan is end-of-life; use crossbeam-channel instead"
+informational = "unmaintained"
+date = "2018-07-31"
+url = "https://github.com/BurntSushi/chan/commit/0a5c0d4ad4adc90a54ee04a427389acf2e157275"
+unaffected_versions = ["> 0.1.23"] # last release
+description = """
+**`chan` has reached its end-of-life and is now deprecated.**
+
+The intended successor of this crate is
+[`crossbeam-channel`](https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-channel).
+Its API is strikingly similar, but comes with a much better `select!` macro,
+better performance, a better test suite and an all-around better
+implementation.
+"""