diff --git a/git-cliff/src/lib.rs b/git-cliff/src/lib.rs
index a042174..9e9a96a 100644
--- a/git-cliff/src/lib.rs
+++ b/git-cliff/src/lib.rs
@@ -557,7 +557,7 @@ pub fn run(mut args: Opt) -> Result<()> {
 	}
 
 	if let Some(path) = &args.prepend {
-		changelog.prepend(fs::read_to_string(path)?, out)?;
+		changelog.prepend(fs::read_to_string(path)?, &mut File::create(path)?)?;
 	}
 	if args.output.is_some() || args.prepend.is_none() {
 		changelog.generate(out)?;