diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index cd4b592b213..9eb9ba54fec 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -51,7 +51,7 @@ API Changes
   factories to be compatible with Java Module System. This allows to load factories
   without META-INF/service from a Java module exposing the factory in the module
   descriptor. This breaks backwards compatibility as custom analysis factories
-  must now also implement the default constructor (see MIGRATE.txt).
+  must now also implement the default constructor (see MIGRATE.md).
   (Uwe Schindler, Dawid Weiss)
 
 * LUCENE-9307: BufferedIndexInput#setBufferSize has been removed. (Adrien Grand)
diff --git a/lucene/README.md b/lucene/README.md
index c9092ce4c0a..92e1eab9218 100644
--- a/lucene/README.md
+++ b/lucene/README.md
@@ -20,4 +20,4 @@ Files are organized by module, for example in core/:
 To review the documentation, read the main documentation page, located at:
 `docs/index.html`
 
-To build Lucene or its documentation for a source distribution, see BUILD.txt
+To build Lucene or its documentation for a source distribution, see `BUILD.md`
diff --git a/lucene/SYSTEM_REQUIREMENTS.md b/lucene/SYSTEM_REQUIREMENTS.md
index 1a8ea6d3781..5ea6b3cdf8c 100644
--- a/lucene/SYSTEM_REQUIREMENTS.md
+++ b/lucene/SYSTEM_REQUIREMENTS.md
@@ -14,5 +14,5 @@ implementing Lucene (document size, number of documents, and number of
 hits retrieved to name a few). The benchmarks page has some information 
 related to performance on particular platforms. 
 
-*To build Apache Lucene from the source, refer to the `BUILD.txt` file in
+*To build Apache Lucene from the source, refer to the `BUILD.md` file in
 the distribution directory.*