diff --git a/src/matrix/session.js b/src/matrix/session.js
index ee313062..8bda0d7f 100644
--- a/src/matrix/session.js
+++ b/src/matrix/session.js
@@ -11,14 +11,14 @@ export default class Session {
 	// loginData has device_id, user_id, home_server, access_token
 	async setLoginData(loginData) {
 		console.log("session.setLoginData");
-		const txn = this._storage.readWriteTxn([this._storage.storeNames.session]);
+		const txn = await this._storage.readWriteTxn([this._storage.storeNames.session]);
 		const session = {loginData};
 		txn.session.set(session);
 		await txn.complete();
 	}
 
 	async load() {
-		const txn = this._storage.readTxn([
+		const txn = await this._storage.readTxn([
 			this._storage.storeNames.session,
 			this._storage.storeNames.roomSummary,
 			this._storage.storeNames.roomState,
diff --git a/src/matrix/storage/idb/storage.js b/src/matrix/storage/idb/storage.js
index 8f411317..b4a6659c 100644
--- a/src/matrix/storage/idb/storage.js
+++ b/src/matrix/storage/idb/storage.js
@@ -19,13 +19,13 @@ export default class Storage {
 		}
 	}
 
-	readTxn(storeNames) {
+	async readTxn(storeNames) {
 		this._validateStoreNames(storeNames);
 		const txn = this._db.transaction(storeNames, "readonly");
 		return new Transaction(txn, storeNames);
 	}
 
-	readWriteTxn(storeNames) {
+	async readWriteTxn(storeNames) {
 		this._validateStoreNames(storeNames);
 		const txn = this._db.transaction(storeNames, "readwrite");
 		return new Transaction(txn, storeNames);
diff --git a/src/matrix/sync.js b/src/matrix/sync.js
index 91d36d68..61659820 100644
--- a/src/matrix/sync.js
+++ b/src/matrix/sync.js
@@ -70,7 +70,7 @@ export default class Sync extends EventEmitter {
 		const response = await this._currentRequest.response();
 		syncToken = response.next_batch;
 		const storeNames = this._storage.storeNames;
-		const syncTxn = this._storage.readWriteTxn([
+		const syncTxn = await this._storage.readWriteTxn([
 			storeNames.session,
 			storeNames.roomSummary,
 			storeNames.roomTimeline,