diff --git a/package.json b/package.json
index 8e7e9ba..729e823 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "lib/index.js",
   "license": "Apache-2.0",
   "dependencies": {
-    "@drift-labs/sdk": "2.48.0-beta.9",
+    "@drift-labs/sdk": "2.48.0-beta.13",
     "@opentelemetry/api": "^1.1.0",
     "@opentelemetry/auto-instrumentations-node": "^0.31.1",
     "@opentelemetry/exporter-prometheus": "^0.31.0",
diff --git a/src/core/metrics.ts b/src/core/metrics.ts
index 344661a..99e9de0 100644
--- a/src/core/metrics.ts
+++ b/src/core/metrics.ts
@@ -134,11 +134,10 @@ const handleHealthCheck = async (req, res, next) => {
 		if (lastHealthCheckState) {
 			res.writeHead(200);
 			res.end('OK');
-		} else {
-			res.writeHead(500);
-			res.end(`NOK`);
+			lastHealthCheckPerformed = Date.now();
+			return;
 		}
-		return;
+		// always check if last check was unhealthy (give it another chance to recover)
 	}
 
 	const { lastSlotReceived, lastSlotReceivedMutex } = getSlotHealthCheckInfo();
@@ -149,7 +148,9 @@ const handleHealthCheck = async (req, res, next) => {
 			lastHealthCheckState = lastSlotReceived > lastHealthCheckSlot;
 			if (!lastHealthCheckState) {
 				logger.error(
-					`Unhealthy: lastSlot: ${lastSlotReceived}, lastHealthCheckSlot: ${lastHealthCheckSlot}`
+					`Unhealthy: lastSlot: ${lastSlotReceived}, lastHealthCheckSlot: ${lastHealthCheckSlot}, timeSinceLastCheck: ${
+						Date.now() - lastHealthCheckPerformed
+					} ms`
 				);
 			}
 
diff --git a/src/index.ts b/src/index.ts
index 8caed26..7d06acb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -21,8 +21,8 @@ import {
 	SlotSource,
 	SlotSubscriber,
 	UserMap,
-	UserStatsMap,
 	Wallet,
+	getUserStatsAccountPublicKey,
 	getVariant,
 	groupL2,
 	initialize,
@@ -231,8 +231,6 @@ const main = async () => {
 		lastSlotReceived = slotSource.getSlot();
 	}, ORDERBOOK_UPDATE_INTERVAL);
 
-	const userStatsMap = new UserStatsMap(driftClient);
-
 	logger.info(`Initializing userMap...`);
 	const initUserMapStart = Date.now();
 	const userMap = new UserMap(
@@ -243,12 +241,6 @@ const main = async () => {
 	await userMap.subscribe();
 	logger.info(`userMap initialized in ${Date.now() - initUserMapStart} ms`);
 
-	const initUserStatsMapStarts = Date.now();
-	await userStatsMap.sync(userMap.getUniqueAuthorities());
-	logger.info(
-		`userStatsMap initialized in ${Date.now() - initUserStatsMapStarts} ms`
-	);
-
 	logger.info(`Initializing DLOBSubscriber...`);
 	const initDlobSubscriberStart = Date.now();
 	const dlobSubscriber = new DLOBSubscriber({
@@ -265,11 +257,7 @@ const main = async () => {
 	MARKET_SUBSCRIBERS = await initializeAllMarketSubscribers(driftClient);
 
 	const handleStartup = async (_req, res, _next) => {
-		if (
-			driftClient.isSubscribed &&
-			userMap.size() > 0 &&
-			userStatsMap.size() > 0
-		) {
+		if (driftClient.isSubscribed && userMap.size() > 0) {
 			res.writeHead(200);
 			res.end('OK');
 		} else {
@@ -559,12 +547,12 @@ const main = async () => {
 							if (`${includeUserStats}`.toLowerCase() === 'true') {
 								const userAccount = side.userAccount.toBase58();
 								await userMap.mustGet(userAccount);
-								const userStats = await userStatsMap.mustGet(
-									userMap.getUserAuthority(userAccount)!.toBase58()
-								);
 								topMakers.add([
 									userAccount,
-									userStats.userStatsAccountPublicKey.toBase58(),
+									getUserStatsAccountPublicKey(
+										driftClient.program.programId,
+										userMap.getUserAuthority(userAccount)
+									),
 								]);
 							} else {
 								topMakers.add(side.userAccount.toBase58());
diff --git a/yarn.lock b/yarn.lock
index fe86aa4..8f7a265 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -80,10 +80,10 @@
     enabled "2.0.x"
     kuler "^2.0.0"
 
-"@drift-labs/sdk@2.48.0-beta.9":
-  version "2.48.0-beta.9"
-  resolved "https://registry.yarnpkg.com/@drift-labs/sdk/-/sdk-2.48.0-beta.9.tgz#2d0c99f58387ff3c5e45859ae4fe088339c8dd55"
-  integrity sha512-y0wrq680nv7Uwvcg9jOrjZPXxoae9yRg8M9B4bQgDFeNJmZNmcEmnLhWQ+CbPi8u/O0glhOdtKUk4UF9eSPXAg==
+"@drift-labs/sdk@2.48.0-beta.13":
+  version "2.48.0-beta.13"
+  resolved "https://registry.yarnpkg.com/@drift-labs/sdk/-/sdk-2.48.0-beta.13.tgz#0ad1cfd4daac97e1859fe617a749a2676e462b63"
+  integrity sha512-ogtY38Db44PVZOr8WwNHijnwVMBLFvIYNxmlE9BPehdEgIQ9PYT9QXalanhQ1Ruc/Cs5DbMIT3XvjtLyfFzEUg==
   dependencies:
     "@coral-xyz/anchor" "0.28.1-beta.2"
     "@ellipsis-labs/phoenix-sdk" "^1.4.2"