diff --git a/sdk/src/api/opt/tls.rs b/sdk/src/api/opt/tls.rs
index ca3f4a9e..e6e35c73 100644
--- a/sdk/src/api/opt/tls.rs
+++ b/sdk/src/api/opt/tls.rs
@@ -1,4 +1,7 @@
 /// TLS Configuration
+///
+/// WARNING: `native-tls` and `rustls` are not stable yet. As we may need to upgrade those dependencies
+/// from time to time to keep up with their security fixes, this type is excluded from our stability guarantee.
 #[cfg(any(feature = "native-tls", feature = "rustls"))]
 #[cfg_attr(docsrs, doc(cfg(any(feature = "native-tls", feature = "rustls"))))]
 #[derive(Debug, Clone)]