diff --git a/unfurler/config.sample.json b/unfurler/config.sample.json
index 64f56c1f7..0e4e8d530 100644
--- a/unfurler/config.sample.json
+++ b/unfurler/config.sample.json
@@ -9,8 +9,8 @@
     "NETWORK": "bitcoin" // "bitcoin" | "liquid" | "bisq" (optional - defaults to "bitcoin")
   },
   "PUPPETEER": {
-    "DISABLE": false, // optional, boolean, disables puppeteer and /render endpoints
-    "CLUSTER_SIZE": 2,
+    "ENABLED": false, // optional, boolean, enables puppeteer and /render endpoints (default true)
+    "CLUSTER_SIZE": 2, // maximum number of parallel chromium pages. CLUSTER_SIZE=0 implies ENABLED=false
     "EXEC_PATH": "/usr/local/bin/chrome", // optional
     "MAX_PAGE_AGE": 86400, // maximum lifetime of a page session (in seconds)
     "RENDER_TIMEOUT": 3000, // timeout for preview image rendering (in ms) (optional)
diff --git a/unfurler/src/config.ts b/unfurler/src/config.ts
index 3c4a4e422..c04f58007 100644
--- a/unfurler/src/config.ts
+++ b/unfurler/src/config.ts
@@ -11,7 +11,7 @@ interface IConfig {
     NETWORK?: string;
   };
   PUPPETEER: {
-    DISABLE: boolean;
+    ENABLED: boolean;
     CLUSTER_SIZE: number;
     EXEC_PATH?: string;
     MAX_PAGE_AGE?: number;
@@ -29,7 +29,7 @@ const defaults: IConfig = {
     'HTTP_PORT': 4200,
   },
   'PUPPETEER': {
-    'DISABLE': false,
+    'ENABLED': true,
     'CLUSTER_SIZE': 1,
   },
 };
diff --git a/unfurler/src/index.ts b/unfurler/src/index.ts
index 167225af5..305a0a4c2 100644
--- a/unfurler/src/index.ts
+++ b/unfurler/src/index.ts
@@ -13,6 +13,8 @@ if (config.PUPPETEER.EXEC_PATH) {
   puppeteerConfig.executablePath = config.PUPPETEER.EXEC_PATH;
 }
 
+const puppeteerEnabled = config.PUPPETEER.ENABLED && (config.PUPPETEER.CLUSTER_SIZE > 0);
+
 class Server {
   private server: http.Server | undefined;
   private app: Application;
@@ -24,7 +26,7 @@ class Server {
   constructor() {
     this.app = express();
     this.mempoolHost = config.MEMPOOL.HTTP_HOST + (config.MEMPOOL.HTTP_PORT ? ':' + config.MEMPOOL.HTTP_PORT : '');
-    this.secureHost = this.mempoolHost.startsWith('https');
+    this.secureHost = config.SERVER.HOST.startsWith('https');
     this.network = config.MEMPOOL.NETWORK || 'bitcoin';
     this.startServer();
   }
@@ -39,7 +41,7 @@ class Server {
       .use(express.text())
       ;
 
-    if (!config.PUPPETEER.DISABLE) {
+    if (puppeteerEnabled) {
       this.cluster = await Cluster.launch({
           concurrency: ReusablePage,
           maxConcurrency: config.PUPPETEER.CLUSTER_SIZE,
@@ -68,7 +70,7 @@ class Server {
   }
 
   setUpRoutes() {
-    if (!config.PUPPETEER.DISABLE) {
+    if (puppeteerEnabled) {
       this.app.get('/render*', async (req, res) => { return this.renderPreview(req, res) })
     } else {
       this.app.get('/render*', async (req, res) => { return this.renderDisabled(req, res) })