diff --git a/async-nats/Cargo.toml b/async-nats/Cargo.toml
index 34f8d3982..b207b5b00 100644
--- a/async-nats/Cargo.toml
+++ b/async-nats/Cargo.toml
@@ -41,6 +41,9 @@ ring = "0.16"
 rand = "0.8"
 webpki = { package = "rustls-webpki", version = "0.101.2", features = ["alloc", "std"] }
 
+# for -Z minimal-versions
+rustls = "0.21.6" # used by tokio-rustls 0.24.0
+
 [dev-dependencies]
 criterion =  { version = "0.5", features = ["async_tokio"]}
 nats-server = { path = "../nats-server" }