diff --git a/gallery_dl/extractor/imagechest.py b/gallery_dl/extractor/imagechest.py
index 9aa03329..9199d125 100644
--- a/gallery_dl/extractor/imagechest.py
+++ b/gallery_dl/extractor/imagechest.py
@@ -44,7 +44,7 @@ class ImagechestGalleryExtractor(GalleryExtractor):
         }
 
     def images(self, page):
-        if " More Files</button>" in page:
+        if ' load-all">' in page:
             url = "{}/p/{}/loadAll".format(self.root, self.gallery_id)
             headers = {
                 "X-Requested-With": "XMLHttpRequest",
diff --git a/gallery_dl/version.py b/gallery_dl/version.py
index b74d977f..d4ab3f64 100644
--- a/gallery_dl/version.py
+++ b/gallery_dl/version.py
@@ -6,4 +6,4 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
-__version__ = "1.26.5"
+__version__ = "1.26.6-dev"