diff --git a/collections/programming-languages/index.md b/collections/programming-languages/index.md
index 58b845dec20..aa830766d74 100644
--- a/collections/programming-languages/index.md
+++ b/collections/programming-languages/index.md
@@ -73,6 +73,7 @@ items:
 - ValeLang/Vale
 - factor/factor
 - julelang/jule
+- Oldes/Rebol3
 display_name: Programming languages
 created_by: leereilly
 ---