diff --git a/src/index.ts b/src/index.ts
index d589808..d5bf8e8 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -81,7 +81,7 @@ class CdpSession {
   private pending = new Map<number, { resolve: (v: any) => void; reject: (e: Error) => void }>();
 
   static async connect(port: number): Promise<CdpSession> {
-    const resp = await fetch(`http://127.0.0.1:${port}/json`);
+    const resp = await fetch(`http://localhost:${port}/json`);
     const targets = (await resp.json()) as Array<{ webSocketDebuggerUrl: string; type: string }>;
     const page = targets.find(t => t.type === 'page');
     if (!page) throw new Error('No Chrome page tab found. Open a tab first.');
@@ -414,12 +414,12 @@ export async function run(
         if (logistics.weight) logistics.weight.source = 'attributes';
       }
       if (matchKey(key, DIMENSION_KEYS)) {
-        logistics.dimensions = parseDimensions(val);
-        if (logistics.dimensions) logistics.dimensions.source = 'attributes';
+        const parsed = parseDimensions(val);
+        if (parsed) { parsed.source = 'attributes'; logistics.dimensions = parsed; }
       }
       if (matchKey(key, VOLUME_KEYS)) {
-        logistics.volume = parseVolume(val);
-        if (logistics.volume) logistics.volume.source = 'attributes';
+        const parsed = parseVolume(val);
+        if (parsed) { parsed.source = 'attributes'; logistics.volume = parsed; }
       }
       if (matchKey(key, ['产地', '发货地', '所在地'])) {
         logistics.origin = val;