diff --git a/dist/index.d.ts.map b/dist/index.d.ts.map
index 3db9341..24173d1 100644
--- a/dist/index.d.ts.map
+++ b/dist/index.d.ts.map
@@ -1 +1 @@
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\ No newline at end of file
+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";AAAA,OAAO,EAAE,MAAM,EAAE,MAAM,QAAQ,CAAC;AAChC,OAAO,EAAE,MAAM,EAAW,MAAM,8BAA8B,CAAC;AAC/D,OAAO,EAAU,QAAQ,EAAY,MAAM,gBAAgB,CAAC;AAI5D,OAAO,KAAK,EAAE,YAAY,EAAE,MAAM,eAAe,CAAC;AASlD,qBAAa,WAAY,SAAQ,MAAM;IACrC,OAAO,CAAC,eAAe,CAAU;IACjC,OAAO,CAAC,EAAE,CAAa;IACvB,OAAO,CAAC,cAAc,CAAU;IAChC,OAAO,CAAC,eAAe,CAAM;IAE7B,OAAO,CAAC,MAAM,CAAC,CAAgB;IAC/B,OAAO,CAAC,mBAAmB,CAAC,CAG1B;IAEF,OAAO,CAAC,OAAO,CAA0C;IACzD,OAAO,CAAC,QAAQ,CAAkD;IAElE,IAAI,GAAG;;MAON;gBAEW,aAAa,UAAO,EAAE,aAAa,UAAQ;IAcvD,IAAI,KAAK,IAAI,MAAM,GAAG,SAAS,CAE9B;IAEY,OAAO,CAAC,MAAM,EAAE,MAAM,GAAG,UAAU,GAAG,OAAO,CAAC,MAAM,CAAC;IAiB5D,IAAI,IAAI,OAAO,CAAC,QAAQ,CAAC;IAIzB,KAAK,IAAI,OAAO,CAAC,IAAI,CAAC;IAkBtB,KAAK,IAAI,OAAO,CAAC,IAAI,CAAC;YAMd,OAAO;IA2BR,QAAQ,CAAC,MAAM,EAAE,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;IAIvC,WAAW,CAAC,MAAM,EAAE,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;IAI1C,WAAW,IAAI,OAAO,CAAC,IAAI,CAAC;IAI5B,SAAS,IAAI,OAAO,CAAC,MAAM,EAAE,CAAC;IAI9B,IAAI,CAAC,KAAK,EAAE,MAAM,GAAG,UAAU,GAAG,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;CAQtE;AAQD,qBAAa,MAAO,SAAQ,MAAM;IAChC,OAAO,CAAC,EAAE,CAAS;IACnB,OAAO,CAAC,YAAY,CAAqC;IAEzD,OAAO,CAAC,SAAS,CAAe;IAEhC,OAAO,CAAC,KAAK,CAAc;IAC3B,OAAO,CAAC,QAAQ,CAAC,CAAa;gBAElB,EAAE,EAAE,MAAM,EAAE,KAAK,EAAE,WAAW;IAM1C,OAAO,CAAC,gBAAgB,CAAC,CAAa;IAEtC,IAAI,eAAe,IAAI,UAAU,CAEhC;IAED,OAAO,CAAC,UAAU,CAAC,CAAa;IAEhC,IAAI,SAAS,IAAI,UAAU,CAE1B;IAEK,KAAK;YASG,SAAS;IAgEvB,EAAE,CAAC,CAAC,SAAS,YAAY,CAAC,UAAU,CAAC,MAAM,GAAG,MAAM,CAAC,EACnD,KAAK,EAAE,CAAC,EACR,EAAE,EAAE,YAAY,CAAC,aAAa,CAAC,MAAM,GAAG,MAAM,EAAE,CAAC,CAAC,EAClD,OAAO,CAAC,EAAE,GAAG,GACZ,IAAI;IAiBP,GAAG,CAAC,CAAC,SAAS,YAAY,CAAC,UAAU,CAAC,MAAM,GAAG,MAAM,CAAC,EACpD,KAAK,EAAE,CAAC,EACR,EAAE,CAAC,EAAE,YAAY,CAAC,aAAa,CAAC,MAAM,GAAG,MAAM,EAAE,CAAC,CAAC,EACnD,OAAO,CAAC,EAAE,GAAG,EACb,IAAI,CAAC,EAAE,OAAO,GACb,IAAI;IASP,KAAK,CAAC,OAAO,EAAE,MAAM,GAAG,MAAM,GAAG,IAAI;IAIrC,GAAG,IAAI,IAAI;IAUX,OAAO,CAAC,WAAW;IAMnB,OAAO,CAAC,UAAU;CAInB;AAID,eAAO,MAAM,YAAY,+BAA4C,CAAC"}
\ No newline at end of file
diff --git a/dist/index.js b/dist/index.js
index 285e466..e75a188 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -137,12 +137,13 @@ export class Socket extends Client {
     async _initSync() {
         this.userData = null;
         const mux = Protomux.from(this);
-        let updateDone = defer();
+        let updateSent = defer();
+        let updateReceived = defer();
         const setup = defer();
         const [update] = this.connectModule("syncProtomux", { id: this.id }, async (data) => {
             if (data === true) {
-                updateDone.resolve();
-                updateDone = defer();
+                updateSent.resolve();
+                updateSent = defer();
                 return;
             }
             await this.syncMutex.acquire();
@@ -165,9 +166,9 @@ export class Socket extends Client {
                 }
             });
             mux._free = mux._free.filter((item) => item !== undefined);
-            update(true);
             this.syncMutex.release();
             setup.resolve();
+            updateReceived.resolve();
         });
         const send = async (mux) => {
             update({
@@ -175,7 +176,9 @@ export class Socket extends Client {
                 local: Object.keys(mux._local),
                 free: mux._free,
             });
-            await updateDone.promise;
+            updateReceived = defer();
+            await updateSent.promise;
+            await updateReceived.promise;
         };
         mux.syncState = send.bind(undefined, mux);
         await setup.promise;