diff --git a/youtube_dl/extractor/discovery.py b/youtube_dl/extractor/discovery.py
index ce680a9f3..fdce1429a 100644
--- a/youtube_dl/extractor/discovery.py
+++ b/youtube_dl/extractor/discovery.py
@@ -9,7 +9,7 @@ from ..compat import compat_str
 
 
 class DiscoveryIE(InfoExtractor):
-    _VALID_URL = r'''(?x)http://(?:www\.)?(?:
+    _VALID_URL = r'''(?x)https?://(?:www\.)?(?:
             discovery|
             investigationdiscovery|
             discoverylife|