diff --git a/docs-config.ts b/docs-config.ts
index 8eea5189e..cfb0a6de8 100644
--- a/docs-config.ts
+++ b/docs-config.ts
@@ -46,7 +46,7 @@ export default {
 
   // Long-term support versions configuration.
   ltsVersions: {
-    prometheus: ["3.5"],
+    prometheus: ["3.5", "3.13"],
   },
 
   // Repositories for the downloads page. The order in this file is the