diff --git a/zinnia/feeds.py b/zinnia/feeds.py
index 32f0347ea..a0f7c4982 100644
--- a/zinnia/feeds.py
+++ b/zinnia/feeds.py
@@ -127,10 +127,14 @@ def item_enclosure_url(self, item):
         Return an image for enclosure.
         """
         if item.image:
-            url = item.image.url
+            url = item.image.url.replace("https://", "http://")
         else:
             img = BeautifulSoup(item.html_content, 'html.parser').find('img')
-            url = img.get('src') if img else None
+            if img:
+                url = img.get('src')
+                url = url.replace("https://", "http://") if url else None
+            else:
+                url = None
         self.cached_enclosure_url = url
         return urljoin(self.site_url, url) if url else None
 
diff --git a/zinnia/tests/test_feeds.py b/zinnia/tests/test_feeds.py
index 1658f3564..ff0853ccf 100644
--- a/zinnia/tests/test_feeds.py
+++ b/zinnia/tests/test_feeds.py
@@ -162,6 +162,23 @@ def test_entry_feed_enclosure(self):
         self.assertEqual(feed.item_enclosure_length(entry), '100000')
         self.assertEqual(feed.item_enclosure_mime_type(entry), 'image/jpeg')
 
+    def test_entry_feed_enclosure_replace_https(self):
+        entry = self.create_published_entry()
+        feed = EntryFeed()
+        entry.content = 'My test content with image in https ' \
+                        '<img src="https://test.com/image.jpg" />'
+        entry.save()
+        self.assertEqual(
+            feed.item_enclosure_url(entry), 'http://test.com/image.jpg')
+
+    def test_entry_feed_enclosure_without_image(self):
+        entry = self.create_published_entry()
+        feed = EntryFeed()
+        entry.content = 'My test content without image '
+        entry.save()
+        self.assertEqual(
+            feed.item_enclosure_url(entry), None)
+
     def test_entry_feed_enclosure_issue_134(self):
         entry = self.create_published_entry()
         feed = EntryFeed()