diff --git a/README.md b/README.md
index 1e29999..49eb7c8 100644
--- a/README.md
+++ b/README.md
@@ -146,6 +146,8 @@ Default value: `undefined`
 
 ### `header`
 
+Default value: `"# Changelog"`
+
 Set the main header for the changelog document:
 
 ```json
diff --git a/index.js b/index.js
index 9d66558..7350e8c 100644
--- a/index.js
+++ b/index.js
@@ -166,7 +166,7 @@ class ConventionalChangelog extends Plugin {
   }
 
   async writeChangelog() {
-    const { infile, header: _header = '' } = this.options;
+    const { infile, header: _header = '# Changelog' } = this.options;
     let { changelog } = this.config.getContext();
     const header = _header.split(/\r\n|\r|\n/g).join(EOL);