diff --git a/.lycheeignore b/.lycheeignore
index f8b8312fd..ba51dd5b8 100644
--- a/.lycheeignore
+++ b/.lycheeignore
@@ -16,4 +16,9 @@ https://github.com/trieshard/source-strategy-assessment/blob/master/framework.md
 https://dl.acm.org/doi/10.5555/3158161.3158175
 https://retromat.org/en/
 # O'Reilly returns 403 to the link checker's automated requests, though the page loads fine in a browser.
-http://www.oreilly.com/pub/e/3884
\ No newline at end of file
+http://www.oreilly.com/pub/e/3884
+# These sites return 403 to the link checker's automated requests, though the pages load fine in a browser.
+https://www.oreilly.com/library/
+https://community.sap.com/
+https://medium.com/
+artofcommunityonline.org