diff --git a/README.md b/README.md
index 8cd3ec970b53..7d4fa7103c5d 100644
--- a/README.md
+++ b/README.md
@@ -72,8 +72,8 @@ There is more information in the [contributing] guide.
 [contributing]: CONTRIBUTING.md
 [parquet-readme]: parquet/README.md
 [flight-readme]: arrow-flight/README.md
-[datafusion-readme]: https://github.com/apache/arrow-datafusion/blob/master/README.md
-[ballista-readme]: https://github.com/apache/arrow-ballista/blob/master/README.md
+[datafusion-readme]: https://github.com/apache/arrow-datafusion/blob/main/README.md
+[ballista-readme]: https://github.com/apache/arrow-ballista/blob/main/README.md
 [objectstore-readme]: object_store/README.md
 [issues]: https://github.com/apache/arrow-rs/issues
 [discussions]: https://github.com/apache/arrow-rs/discussions