2.23.1 release
diff --git a/tools/maven.bzl b/tools/maven.bzl
index 4a93048..2ac0359 100644
--- a/tools/maven.bzl
+++ b/tools/maven.bzl
@@ -35,4 +35,4 @@
         **kwargs
     )
 
-POM_VERSION = "${project.version}"
+POM_VERSION = "2.23.1"