diff --git a/src/lysand/objects.rs b/src/lysand/objects.rs
index 24ded89..4ed13de 100644
--- a/src/lysand/objects.rs
+++ b/src/lysand/objects.rs
@@ -49,6 +49,30 @@ pub enum LysandType {
     ServerMetadata,
 }
 
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub enum LysandExtensions {
+    #[serde(rename = "org.lysand:microblogging/Announce")]
+    Announce,
+    #[serde(rename = "org.lysand:custom_emojis")]
+    CustomEmojis,
+    #[serde(rename = "org.lysand:reactions/Reaction")]
+    Reaction,
+    #[serde(rename = "org.lysand:reactions")]
+    Reactions,
+    #[serde(rename = "org.lysand:polls")]
+    Polls,
+    #[serde(rename = "org.lysand:is_cat")]
+    IsCat,
+    #[serde(rename = "org.lysand:server_endorsement/Endorsement")]
+    Endorsement,
+    #[serde(rename = "org.lysand:server_endorsement")]
+    EndorsementCollection,
+    #[serde(rename = "org.lysand:reports/Report")]
+    Report,
+    #[serde(rename = "org.lysand:vanity")]
+    Vanity,
+}
+
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct PublicKey {
     public_key: String,