diff --git a/app/lib/methods/getRooms.js b/app/lib/methods/getRooms.js
deleted file mode 100644
index 5004beda0d..0000000000
--- a/app/lib/methods/getRooms.js
+++ /dev/null
@@ -1,9 +0,0 @@
-export default function (updatedSince) {
-	// subscriptions.get: Since RC 0.60.0
-	// rooms.get: Since RC 0.62.0
-	if (updatedSince) {
-		updatedSince = updatedSince.toISOString();
-		return Promise.all([this.sdk.get('subscriptions.get', { updatedSince }), this.sdk.get('rooms.get', { updatedSince })]);
-	}
-	return Promise.all([this.sdk.get('subscriptions.get'), this.sdk.get('rooms.get')]);
-}
diff --git a/app/lib/methods/getRooms.ts b/app/lib/methods/getRooms.ts
new file mode 100644
index 0000000000..e4f369975f
--- /dev/null
+++ b/app/lib/methods/getRooms.ts
@@ -0,0 +1,15 @@
+import sdk from '../rocketchat/services/sdk';
+
+export default function (updatedSince: Date) {
+	// subscriptions.get: Since RC 0.60.0
+	// rooms.get: Since RC 0.62.0
+	if (updatedSince) {
+		const updatedDate = updatedSince.toISOString();
+		// TODO: missing definitions from server
+		// @ts-ignore
+		return Promise.all([sdk.get('subscriptions.get', { updatedDate }), sdk.get('rooms.get', { updatedDate })]);
+	}
+	// TODO: missing definitions from server
+	// @ts-ignore
+	return Promise.all([sdk.get('subscriptions.get'), sdk.get('rooms.get')]);
+}