diff --git a/pkg/template.go b/pkg/template.go
index 63158e5..1ed9afc 100644
--- a/pkg/template.go
+++ b/pkg/template.go
@@ -84,6 +84,9 @@ func mustRenderTemplate(wr io.Writer, r *http.Request, layout string, filename s
 	if _, err := t.ParseFiles(templateFile(filename), templateFile(layout), templateFile("form.gohtml")); err != nil {
 		panic(err)
 	}
+	if w, ok := wr.(http.ResponseWriter); ok {
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	}
 	if err := t.ExecuteTemplate(wr, layout, data); err != nil {
 		panic(err)
 	}