diff --git a/imap-types/src/auth.rs b/imap-types/src/auth.rs
index fe21f455..02ac91b5 100644
--- a/imap-types/src/auth.rs
+++ b/imap-types/src/auth.rs
@@ -71,6 +71,9 @@ pub enum AuthMechanism<'a> {
     /// * <https://developers.google.com/gmail/imap/xoauth2-protocol>
     XOAuth2,
 
+    //
+    // --- SHA-1 ---
+    //
     /// SCRAM-SHA-1
     ///
     /// # Reference(s):
@@ -85,6 +88,9 @@ pub enum AuthMechanism<'a> {
     /// * https://datatracker.ietf.org/doc/html/rfc5802
     ScramSha1Plus,
 
+    //
+    // --- SHA-2 ---
+    //
     /// SCRAM-SHA-256
     ///
     /// # Reference(s):
@@ -99,6 +105,23 @@ pub enum AuthMechanism<'a> {
     /// * https://datatracker.ietf.org/doc/html/rfc7677
     ScramSha256Plus,
 
+    //
+    // --- SHA-3 ---
+    //
+    /// SCRAM-SHA3-512
+    ///
+    /// # Reference(s):
+    ///
+    /// * https://datatracker.ietf.org/doc/html/draft-melnikov-scram-sha3-512
+    ScramSha3_512,
+
+    /// SCRAM-SHA3-512-PLUS
+    ///
+    /// # Reference(s):
+    ///
+    /// * https://datatracker.ietf.org/doc/html/draft-melnikov-scram-sha3-512
+    ScramSha3_512Plus,
+
     /// Some other (unknown) mechanism.
     Other(AuthMechanismOther<'a>),
 }
@@ -140,6 +163,8 @@ impl<'a> AsRef<str> for AuthMechanism<'a> {
             Self::ScramSha1Plus => "SCRAM-SHA-1-PLUS",
             Self::ScramSha256 => "SCRAM-SHA-256",
             Self::ScramSha256Plus => "SCRAM-SHA-256-PLUS",
+            Self::ScramSha3_512 => "SCRAM-SHA3-512",
+            Self::ScramSha3_512Plus => "SCRAM-SHA3-512-PLUS",
             Self::Other(other) => other.0.as_ref(),
         }
     }