diff --git a/modules/server/server.go b/modules/server/server.go
index c37919e..fda5d89 100644
--- a/modules/server/server.go
+++ b/modules/server/server.go
@@ -426,6 +426,7 @@ func Start(dir string) error {
 		} else if strings.HasSuffix(route, ".md") {
 			data, err = os.ReadFile(route)
 			data = []byte(markdownToHTML(string(data)))
+			data = []byte("<style>body {max-width: 80ch;}</style>\n" + string(data))
 		} else {
 			data, err = os.ReadFile(route)
 		}