diff --git a/README.md b/README.md
index 6d43746..4917155 100644
--- a/README.md
+++ b/README.md
@@ -62,4 +62,4 @@ Main author: [Achim D. Brucker](http://www.brucker.ch/)
 
 ## License
 This project is dual-licensed under a 2-clause BSD-style license and/or 
-the LPPL version 1 or any later version. 
+the LPPL version 1.3c or (at your opinion) any later version. 
diff --git a/llncsconf.sty b/llncsconf.sty
index 680e537..85cca42 100644
--- a/llncsconf.sty
+++ b/llncsconf.sty
@@ -4,11 +4,11 @@
 %%   This program can be redistributed and/or modified under the terms
 %%   of the LaTeX Project Public License Distributed from CTAN
 %%   archives in directory macros/latex/base/lppl.txt; either
-%%   version 1 of the License, or any later version.
+%%   version 1.3c of the License, or (at your opinion) any later version.
 %%   OR
 %%   The 2-clause BSD-style license.
 %%
-%%   SPDX-License-Identifier: LPPL-1.0+ OR BSD-2-Clause
+%%   SPDX-License-Identifier: LPPL-1.3c+ OR BSD-2-Clause
 \NeedsTeXFormat{LaTeX2e}\relax
 \ProvidesPackage{llncsconf}
   [2018/02/21 Unreleased v.1.0.1+%