diff --git a/client.d.ts b/client.d.ts
index 2834978..8a67919 100644
--- a/client.d.ts
+++ b/client.d.ts
@@ -243,6 +243,8 @@ export declare namespace matchmaking {
     setJoinable(joinable: boolean): boolean
     getData(key: string): string | null
     setData(key: string, value: string): boolean
+    getMemberData(steamId64: bigint, key: string): string | null
+    setMemberData(key: string, value: string): void
     deleteData(key: string): boolean
     /** Get an object containing all the lobby data */
     getFullData(): Record<string, string>
diff --git a/src/api/matchmaking.rs b/src/api/matchmaking.rs
index 441c9e6..485866e 100644
--- a/src/api/matchmaking.rs
+++ b/src/api/matchmaking.rs
@@ -5,7 +5,7 @@ pub mod matchmaking {
     use crate::api::localplayer::PlayerSteamId;
     use napi::bindgen_prelude::{BigInt, Error};
     use std::collections::HashMap;
-    use steamworks::LobbyId;
+    use steamworks::{LobbyId, SteamId};
     use tokio::sync::oneshot;
 
     #[napi]
@@ -95,6 +95,27 @@ pub mod matchmaking {
                 .set_lobby_data(self.lobby_id, &key, &value)
         }
 
+        #[napi]
+        pub fn get_member_data(&self, steam_id64: BigInt, key: String) -> Option<String> {
+            let client = crate::client::get_client();
+            client
+                .matchmaking()
+                .get_lobby_member_data(
+                    self.lobby_id,
+                    SteamId::from_raw(steam_id64.get_u64().1),
+                    &key,
+                )
+                .map(|s| s.to_string())
+        }
+
+        #[napi]
+        pub fn set_member_data(&self, key: String, value: String) {
+            let client = crate::client::get_client();
+            client
+                .matchmaking()
+                .set_lobby_member_data(self.lobby_id, &key, &value)
+        }
+
         #[napi]
         pub fn delete_data(&self, key: String) -> bool {
             let client = crate::client::get_client();