diff --git a/README.md b/README.md
index c3a53175..17c76016 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Current features:
 - [ ] Initiating account recovery
 - Identifier validation challenges
   - [x] HTTP (http-01)
-  - [ ] TLS with Server Name Indication (tls-sni-01)
+  - [x] TLS with Server Name Indication (tls-sni-01)
   - [ ] Proof of Possession of a Prior Key (proofOfPossession-01)
   - [ ] DNS (dns-01) - Implemented in branch, blocked by upstream.
 - [x] Certificate bundling