diff --git a/README.md b/README.md
index a54fbcd..f0aaa66 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,11 @@ Aalto Logo Package from https://wiki.aalto.fi/display/aaltolatex/
 The produced PDF file should conform to PDF/A-1b or PDF/A-2b
 
 Online PDF/A validator: https://www.pdf-online.com/osa/validate.aspx
+
+## Diff
+
+Generate a diff PDF with git-latexdiff: https://gitlab.com/git-latexdiff/git-latexdiff
+
+```
+./git-latexdiff --prepare "make $(echo include/*.tex)" --main thesis.tex -b --latexmk --ignore-latex-errors -t CFONT -o diff.pdf 7c9ad7c --
+```