diff --git a/gallery_dl/extractor/mangoxo.py b/gallery_dl/extractor/mangoxo.py
index 950b3458..7e7037b2 100644
--- a/gallery_dl/extractor/mangoxo.py
+++ b/gallery_dl/extractor/mangoxo.py
@@ -28,7 +28,7 @@ class MangoxoAlbumExtractor(MangoxoBase, Extractor):
     filename_fmt = "{album[id]}_{num:>03}.{extension}"
     directory_fmt = ("{category}", "{channel[name]}", "{album[name]}")
     archive_fmt = "{album[id]}_{num}"
-    pattern = r"(?:https://)?(?:www\.)?mangoxo\.com/album/(\w+)"
+    pattern = r"(?:https?://)?(?:www\.)?mangoxo\.com/album/(\w+)"
     test = ("https://www.mangoxo.com/album/lzVOv1Q9", {
         "url": "ad921fe62663b06e7d73997f7d00646cab7bdd0d",
         "keyword": {
@@ -105,7 +105,7 @@ class MangoxoAlbumExtractor(MangoxoBase, Extractor):
 class MangoxoChannelExtractor(MangoxoBase, Extractor):
     """Extractor for all albums on a mangoxo channel"""
     subcategory = "channel"
-    pattern = r"(?:https://)?(?:www\.)?mangoxo\.com/channel/(\w+)"
+    pattern = r"(?:https?://)?(?:www\.)?mangoxo\.com/channel/(\w+)"
     test = ("https://www.mangoxo.com/channel/QeYKRkO0", {
         "pattern": MangoxoAlbumExtractor.pattern,
         "range": "1-30",
diff --git a/gallery_dl/extractor/wikiart.py b/gallery_dl/extractor/wikiart.py
index ee1adefe..b9c223c2 100644
--- a/gallery_dl/extractor/wikiart.py
+++ b/gallery_dl/extractor/wikiart.py
@@ -11,7 +11,7 @@
 from .common import Extractor, Message
 from .. import text
 
-BASE_PATTERN = r"(?:https://)?(?:www\.)?wikiart\.org/([a-z]+)"
+BASE_PATTERN = r"(?:https?://)?(?:www\.)?wikiart\.org/([a-z]+)"
 
 
 class WikiartExtractor(Extractor):
diff --git a/gallery_dl/extractor/yaplog.py b/gallery_dl/extractor/yaplog.py
index 1c41db25..24f4ba29 100644
--- a/gallery_dl/extractor/yaplog.py
+++ b/gallery_dl/extractor/yaplog.py
@@ -76,7 +76,7 @@ class YaplogExtractor(AsynchronousMixin, Extractor):
 class YaplogUserExtractor(YaplogExtractor):
     """Extractor for a user's blog on yaplog.jp"""
     subcategory = "user"
-    pattern = r"(?:https://)?(?:www\.)?yaplog\.jp/(\w+)/?(?:$|[?&#])"
+    pattern = r"(?:https?://)?(?:www\.)?yaplog\.jp/(\w+)/?(?:$|[?&#])"
     test = ("https://yaplog.jp/omitakashi3", {
         "pattern": r"https://img.yaplog.jp/img/18/pc/o/m/i/omitakashi3/0/",
         "count": ">= 2",
@@ -92,7 +92,7 @@ class YaplogUserExtractor(YaplogExtractor):
 class YaplogPostExtractor(YaplogExtractor):
     """Extractor for images from a blog post on yaplog.jp"""
     subcategory = "post"
-    pattern = (r"(?:https://)?(?:www\.)?yaplog\.jp"
+    pattern = (r"(?:https?://)?(?:www\.)?yaplog\.jp"
                r"/(\w+)/(?:archive|image)/(\d+)")
     test = ("https://yaplog.jp/imamiami0726/image/1299", {
         "url": "896cae20fa718735a57e723c48544e830ff31345",