diff --git a/drift-common b/drift-common
index 78cb08e..0303c32 160000
--- a/drift-common
+++ b/drift-common
@@ -1 +1 @@
-Subproject commit 78cb08e848cffa103a4c382948237f8f5113b967
+Subproject commit 0303c32d038e1ea1c9c21fc5c31f16730eed5fc3
diff --git a/src/publishers/dlobPublisher.ts b/src/publishers/dlobPublisher.ts
index 05f86a7..dbd29ec 100644
--- a/src/publishers/dlobPublisher.ts
+++ b/src/publishers/dlobPublisher.ts
@@ -324,7 +324,24 @@ const main = async () => {
 	let accountSubscription: DriftClientSubscriptionConfig;
 	let slotSource: SlotSource;
 
-	if (!useWebsocket) {
+	// USE_GRPC=true will override websocket
+	if (useGrpc) {
+		accountSubscription = {
+			type: 'grpc',
+			resubTimeoutMs: 30_000,
+			grpcConfigs: {
+				endpoint,
+				token,
+			},
+		};
+
+		slotSubscriber = new SlotSubscriber(connection);
+		await slotSubscriber.subscribe();
+
+		slotSource = {
+			getSlot: () => slotSubscriber!.getSlot(),
+		};
+	} else if (!useWebsocket) {
 		bulkAccountLoader = new BulkAccountLoader(
 			connection,
 			stateCommitment,