diff --git a/output/cover.pdf b/output/cover.pdf
index 1bcd320..0d4eb79 100644
Binary files a/output/cover.pdf and b/output/cover.pdf differ
diff --git a/scripts/cover.js b/scripts/cover.js
index 054f5ae..0825597 100644
--- a/scripts/cover.js
+++ b/scripts/cover.js
@@ -50,7 +50,7 @@ async function runGhostscript({ rawPath, outputPath, marksPath, title, author, t
   const args = [
     '-dBATCH', '-dNOPAUSE', '-dQUIET',
     '-sDEVICE=pdfwrite',
-    '-dCompatibilityLevel=1.4',
+    '-dCompatibilityLevel=1.3',
     '-dPDFSETTINGS=/prepress',
     '-dEmbedAllFonts=true',
     '-dSubsetFonts=false',