diff --git a/src/main.rs b/src/main.rs
index babdaed..719a44c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,7 +4,7 @@ fn main() {
     let mut src = String::new();
     std::io::stdin()
         .read_to_string(&mut src)
-        .expect("failed to read unicode file");
+        .expect("failed to read utf-8 file");
 
     let p = jotdown::Parser::new(&src);
     jotdown::html::write(std::io::stdout(), p).unwrap();