diff --git a/source/conf.py b/source/conf.py
index 6daeba245..315aa8c52 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -109,6 +109,12 @@
     "https://www.breezy-vcs.org/*",
 ]
 linkcheck_retries = 5
+# Ignore anchors for links to GitHub project pages -- GitHub adds anchors from
+# README.md headings through JavaScript, so Sphinx's linkcheck can't find them
+# in the HTML.
+linkcheck_anchors_ignore_for_url = [
+    r"https://github\.com/",
+]
 
 # -- Options for extlinks ----------------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/extensions/extlinks.html#configuration