diff --git a/notes/source/conf.py b/notes/source/conf.py
index 41844fd..772b754 100644
--- a/notes/source/conf.py
+++ b/notes/source/conf.py
@@ -221,5 +221,9 @@
 tls_verify = False
 
 linkcheck_ignore = [
-    'index.html','pdf/code-packaging-','https://sourceforge.net/', 'https://stackoverflow.com/'
+    'index.html',
+    'pdf/code-packaging-',
+    'https://sourceforge.net/',
+    'https://stackoverflow.com/',
+    'https://opensource.org/licenses'
 ]