diff --git a/packages/cli/src/cmds/validator/handler.ts b/packages/cli/src/cmds/validator/handler.ts
index 01c15126b796..53250c2c9a86 100644
--- a/packages/cli/src/cmds/validator/handler.ts
+++ b/packages/cli/src/cmds/validator/handler.ts
@@ -157,6 +157,7 @@ export async function validatorHandler(args: IValidatorCliArgs & GlobalArgs): Pr
         globalInit: {
           requestWireFormat: parseWireFormat(args, "http.requestWireFormat"),
           responseWireFormat: parseWireFormat(args, "http.responseWireFormat"),
+          headers: {"User-Agent": `Lodestar/${version}`},
         },
       },
       logger,