diff --git a/md-to-pdf b/md-to-pdf
index 9e69e78..d3025eb 100755
--- a/md-to-pdf
+++ b/md-to-pdf
@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 
 SCRIPT_TITLE=md-to-pdf
-depends=(wkhtmltopdf cmark-gfm)  # 'wkhtmltopdf' with qt-error is e.g. provided by the package 'wkhtmltopdf-static'
-optdepends=(notify-send de-p1st-image-width-limit)
+depends=(wkhtmltopdf cmark-gfm)  # 'wkhtmltopdf' is provided by 'wkhtmltopdf-static'
+optdepends=(notify-send de-p1st-image-width-limit)  # 'notify-send' is provided by 'libnotify'
 
 # Uncomment for debugging:
 exec 1> "${HOME}"/"${SCRIPT_TITLE}".log 2>&1