diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35a1a451..876bcc3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 0.13.0 (unreleased)
+## 0.13.0 (2021-01-09)
 
 - Enable HTML minification
 - Support `output_dir` in `config.toml`
@@ -22,6 +22,7 @@ content
 - Update clojure syntax
 - Prefer extra syntaxes to the default ones if we have a match for language
 - Fix `zola serve` having issues with non-ascii paths
+- 404 page now gets the site default language as `lang`
 
 ## 0.12.2 (2020-09-28)
 
diff --git a/components/site/src/lib.rs b/components/site/src/lib.rs
index dd4b43a6..53720e57 100644
--- a/components/site/src/lib.rs
+++ b/components/site/src/lib.rs
@@ -770,6 +770,7 @@ impl Site {
         ensure_directory_exists(&self.output_path)?;
         let mut context = Context::new();
         context.insert("config", &self.config);
+        context.insert("lang", &self.config.default_language);
         let output = render_template("404.html", &self.tera, context, &self.config.theme)?;
         let content = self.inject_livereload(output);
         self.write_content(&[], "404.html", content, false)?;