diff --git a/lib/middleware/template.js b/lib/middleware/template.js
index a229f7c6b..60393cc1c 100644
--- a/lib/middleware/template.js
+++ b/lib/middleware/template.js
@@ -66,7 +66,7 @@ module.exports = async (ctx, next) => {
 
                     if (typeof item.author === 'string') {
                         item.author = collapseWhitespace(item.author);
-                    } else if (typeof item.author === 'object') {
+                    } else if (typeof item.author === 'object' && item.author !== null) {
                         for (const a of item.author) {
                             a.name = collapseWhitespace(a.name);
                         }
diff --git a/lib/v2/test/index.js b/lib/v2/test/index.js
index 9fd68ff2b..dfc8f832b 100644
--- a/lib/v2/test/index.js
+++ b/lib/v2/test/index.js
@@ -214,6 +214,12 @@ module.exports = async (ctx) => {
                 enclosure_type: 'image/jpeg',
                 enclosure_length: 3661,
                 itunes_duration: 36610,
+            },
+            {
+                title: 'Title4 author is null',
+                pubDate: new Date(`2019-3-1`).toUTCString(),
+                link: `https://github.com/DIYgod/RSSHub/pull/11555`,
+                author: null,
             }
         );
     }
diff --git a/test/middleware/template.js b/test/middleware/template.js
index 6698791c4..c2a22fb1f 100644
--- a/test/middleware/template.js
+++ b/test/middleware/template.js
@@ -84,6 +84,7 @@ describe('template', () => {
         const parsed = await parser.parseString(response.text);
         expect(parsed.items[2].author).toBe(['DIYgod1', 'DIYgod2'].map((name) => name).join(', '));
         expect(parsed.items[3].author).toBe(['DIYgod3', 'DIYgod4', 'DIYgod5'].map((name) => name).join(', '));
+        expect(parsed.items[4].author).toBeUndefined();
     });
 
     it(`long title`, async () => {