diff --git a/lh-poster/README.md b/lh-poster/README.md
index cc3fa34..54a7797 100644
--- a/lh-poster/README.md
+++ b/lh-poster/README.md
@@ -1,15 +1,19 @@
 # lh-poster
+
 A LaTeX class (based on the [beamerposter](https://www.ctan.org/tex-archive/macros/latex/contrib/beamerposter))
 that implements the cooperate style of the
 [Software Assurance & Security Research Team Sheffield](https://logialhacking.com).
 
 ## Prerequisites 
+
 * The `lh-presentation` theme/class.
 
 ## Installation 
+
 * Copy the various `*.sty` and `*.cls` files into your `texmf` tree. 
 
 ## Usage
+
 The `lh-poster` class (respectively, a beamerposter theme) is a
 customised setup of the [beamer class](https://www.ctan.org/pkg/beamer) and  of the 
 [beamerposter](https://www.ctan.org/tex-archive/macros/latex/contrib/beamerposter) package. 
@@ -18,5 +22,9 @@ can either use the class file (i.e., `\documentclass{lh-poster}` or use
 `\usetheme{lh-poster}` in a regular beamerposter setup.
 
 ## License
+
 This project is dual-licensed under a 2-clause BSD-style license and/or 
 the LPPL version 1.3c or (at your opinion) any later version. 
+
+SPDX-License-Identifier: LPPL-1.3c+ OR BSD-2-Clause
+