diff --git a/src/crate/theme/rtd/conf/__init__.py b/src/crate/theme/rtd/conf/__init__.py
index 96dfb853..2551a00b 100644
--- a/src/crate/theme/rtd/conf/__init__.py
+++ b/src/crate/theme/rtd/conf/__init__.py
@@ -175,6 +175,10 @@
     "https://www.gnu.org/.*",
     # Temporary failure in name resolution
     "https://jupysql.ploomber.io/.*",
+    # Sporadic CERTIFICATE_VERIFY_FAILED errors.
+    # https://github.com/crate/crate-docs-theme/issues/706
+    r"https://example.com.*",
+    r"https://www.example.com.*",
 ]
 linkcheck_anchors_ignore_for_url = [
     # Requires JavaScript.