diff --git a/core/stencil.config.ts b/core/stencil.config.ts
index d9178de17f..26c92213d8 100644
--- a/core/stencil.config.ts
+++ b/core/stencil.config.ts
@@ -171,6 +171,7 @@ export const config: Config = {
       ]
     }
   ],
+  buildEs5: 'prod',
   extras: {
     cssVarsShim: true,
     dynamicImportShim: true,