diff --git a/project/build.properties b/project/build.properties
index ef3d266..6c37b7b 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1,6 @@
-sbt.version = 1.8.3
+#
+# Copyright (c) 2000-2023 Jarek Sacha. All Rights Reserved.
+# Author's e-mail: jpsacha at gmail.com
+#
+
+sbt.version = 1.9.0