diff --git a/releases-generator/api.go b/releases-generator/api.go
index 3705850..e058797 100644
--- a/releases-generator/api.go
+++ b/releases-generator/api.go
@@ -46,6 +46,9 @@ func (g *generator) Generate() (map[string][]byte, error) {
 	}
 
 	result["index.html"], err = renderTemplate(indexTemplate, index)
+	if err != nil {
+		return nil, fmt.Errorf("failed to render the index.html file: %w", err)
+	}
 
 	for _, version := range index.Versions {
 		result[version.ID+"/index.html"], err = renderTemplate(releaseTemplate, version)