diff --git a/tools/rbcrun/go.mod b/tools/rbcrun/go.mod
index 5ae29725c2..6e99ce975c 100644
--- a/tools/rbcrun/go.mod
+++ b/tools/rbcrun/go.mod
@@ -4,4 +4,4 @@ require go.starlark.net v0.0.0-20201006213952-227f4aabceb5
 
 replace go.starlark.net => ../../../../external/starlark-go
 
-go 1.15
+go 1.21