diff --git a/.github/lychee.toml b/.github/lychee.toml
index 56fddd30..a7387160 100644
--- a/.github/lychee.toml
+++ b/.github/lychee.toml
@@ -24,9 +24,12 @@ exclude = [
 ]
 
 # Exclude file paths matching these patterns (treated as regex)
-# Meeting notes are historical and not actively maintained
+# Meeting notes and summits are historical and not actively maintained
 exclude_path = [
   '/meeting\d+/',
+  '/summits/.*',
+  # Avoid chicken and egg problem, where page is added, index.xml generates link to
+  # https://scientific-python.org/.../page.html, but that has not yet been published.
   '\.xml$'
 ]
 
diff --git a/content/summits/developer/2025/_index.md b/content/summits/developer/2025/_index.md
index 8ceadcde..cc8cea58 100644
--- a/content/summits/developer/2025/_index.md
+++ b/content/summits/developer/2025/_index.md
@@ -22,7 +22,7 @@ We would like to thank the following institutions and projects for sponsoring th
 **Presenting sponsor**
 
 _Contributions to the statistical Python ecosystem at this year's Summit are funded by the NSF POSE Phase 1 award:
-[An open-source ecosystem for statistical Python](https://nsf.elsevierpure.com/en/projects/pose-phase-1-an-open-source-ecosystem-for-statistical-python)_
+[An open-source ecosystem for statistical Python](https://nsf.elsevierpure.com/en/projects/pose-phase-1-an-open-source-ecosystem-for-statistical-python-2)_
 
 <p>&nbsp;</p>