diff --git a/.repo/nvchecker.toml b/.repo/nvchecker.toml
index fe49e9d..544418d 100644
--- a/.repo/nvchecker.toml
+++ b/.repo/nvchecker.toml
@@ -2423,6 +2423,10 @@ gems = "tzinfo-data"
 source = "gems"
 gems = "oj"
 
+[ruby-rbtree]
+source = "gems"
+gems = "rbtree"
+
 # npm
 
 [rollup]