diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
index de985e89..a2a37f79 100644
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -9,4 +9,4 @@ community_bridge: # Replace with a single Community Bridge project-name e.g., cl
 liberapay: # Replace with a single Liberapay username
 issuehunt: # Replace with a single IssueHunt username
 otechie: # Replace with a single Otechie username
-custom: ['https://www.buymeacoffee.com/gW5rPpsKR'] # Up to 4 links
+custom: ['https://www.buymeacoffee.com/gW5rPpsKR','https://arduinojson.org/book/'] # Up to 4 links