diff --git a/README.md b/README.md
index c807a4a..4455c0a 100644
--- a/README.md
+++ b/README.md
@@ -4,5 +4,6 @@
 Dependencies:
 
 * `texlive` (packages: `ctex`, `tikz`, `svg`)
+* `inkscape` (for `svg` to work correctly)
 * `python3` (modules: `qrcode`)
-* `xpdf` (providing executable `pdftopng`)
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+* `xpdf` (providing executable `pdftopng`, only for generating example graphics)
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