diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index 6487630..aab5e10 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -18,8 +18,11 @@ jobs:
 
     - name: Install doxygen
       run: |
+        wget https://www.doxygen.nl/files/doxygen-1.9.6.linux.bin.tar.gz -O - | tar -xzv --directory=/tmp/
+        cd /tmp/doxygen-*
+        sudo make install
         sudo apt-get update
-        sudo apt-get install doxygen doxygen-latex graphviz
+        sudo apt-get install doxygen-latex graphviz
 
     - name: Generate documentation
       run: |
diff --git a/LICENCE.md b/LICENCE.md
index d9637e2..39580ce 100644
--- a/LICENCE.md
+++ b/LICENCE.md
@@ -1,4 +1,4 @@
-Copyright (c) 2009-2022 The GRRLIB Team
+Copyright (c) 2009-2023 The GRRLIB Team
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal