diff --git a/office/zathura-pdf-mupdf/README b/office/zathura-pdf-mupdf/README
index 02740305b2..e573ded57c 100644
--- a/office/zathura-pdf-mupdf/README
+++ b/office/zathura-pdf-mupdf/README
@@ -10,3 +10,6 @@ should point to either pdf-mupdf/pdf.so or pdf-poppler/pdf.so. You can
 also reinstall zathura to switch to the poppler backend, or reinstall
 zathura-pdf-mupdf to switch to the mupdf backend (whichever was installed
 last "wins").
+
+zathura-pdf-mupdf 0.3.2 is the last possible update for Slackware
+14.2. Newer versions would require a newer gtk+3.