diff --git a/docs/conf.py b/docs/conf.py
index 4c1193845..a08dcfe88 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -88,6 +88,7 @@
 linkcheck_anchors = False
 linkcheck_ignore = [r'https://cloud.dwavesys.com/leap',  # redirects, many checks
                     r'https://docs.ocean.dwavesys.com/projects/dimod',
+                    r'https://epubs.siam.org',           # ignores robots since Feb 2023
                     r'.clang-format',
                     r'setup.cfg',
                     ]  # dimod RTD currently not building on boost