diff --git a/mkimage.py b/mkimage.py
index 11ad51d..650f86b 100755
--- a/mkimage.py
+++ b/mkimage.py
@@ -191,7 +191,10 @@ def create_cover(metadata_dict, image_directory, cover_filename, image_is_file):
     text_draw.multiline_text((ttcenter, 200), title_text_joined, font=big_bold_font, align="center")
 
     if len(subtitle_text) > 0:
-        text_draw.text((centered(subtitle_text, medium_font), 350), subtitle_text, font=medium_font, fill=fill_colour_top)
+        subtitle_lines = textwrap.wrap(subtitle_text, width=40)
+        subtitle_lines_joined = "\n".join(subtitle_lines)
+        subtitle_center = centered(subtitle_lines_joined, medium_font)
+        text_draw.multiline_text((subtitle_center, 350), subtitle_lines_joined, font=medium_font, fill=fill_colour_top, align="center")
 
     authors_text_lines = textwrap.wrap(authors_text, width=50)
     authors_text_joined = "\n".join(authors_text_lines)