diff --git a/gallery_dl/extractor/twitter.py b/gallery_dl/extractor/twitter.py
index 020b57cc..ca25c15f 100644
--- a/gallery_dl/extractor/twitter.py
+++ b/gallery_dl/extractor/twitter.py
@@ -221,14 +221,16 @@ class TwitterExtractor(Extractor):
     def _extract_twitpic(self, tweet, files):
         for url in tweet["entities"].get("urls", ()):
             url = url["expanded_url"]
-            if "//twitpic.com/" in url and "/photos/" not in url:
-                response = self.request(url, fatal=False)
-                if response.status_code >= 400:
-                    continue
-                url = text.extr(
-                    response.text, 'name="twitter:image" value="', '"')
-                if url:
-                    files.append({"url": url})
+            if "//twitpic.com/" not in url or "/photos/" in url:
+                continue
+            if url.startswith("http:"):
+                url = "https" + url[4:]
+            response = self.request(url, fatal=False)
+            if response.status_code >= 400:
+                continue
+            url = text.extr(response.text, 'name="twitter:image" value="', '"')
+            if url:
+                files.append({"url": url})
 
     def _transform_tweet(self, tweet):
         if "author" in tweet: