diff --git a/Makefile b/Makefile
index 66babad..dc3895c 100755
--- a/Makefile
+++ b/Makefile
@@ -12,4 +12,4 @@ html:
 epub:
 	mkdir -p out
 	rm -f out/black-book.epub
-	pandoc -S --to epub3 -o out/black-book.epub --epub-cover-image images/cover.jpg --toc --epub-chapter-level=2 --data-dir=epub --template=epub/template.html $(FILES)
+	pandoc -S --to epub3 -o out/black-book.epub --epub-cover-image images/cover.png --toc --epub-chapter-level=2 --data-dir=epub --template=epub/template.html $(FILES)
diff --git a/images/cover.jpg b/images/cover.jpg
deleted file mode 100644
index b6fbfd7..0000000
Binary files a/images/cover.jpg and /dev/null differ
diff --git a/images/cover.png b/images/cover.png
new file mode 100644
index 0000000..e2496dd
Binary files /dev/null and b/images/cover.png differ