diff --git a/src/config/types.ts b/src/config/types.ts
index 0fd907a4..19b87484 100644
--- a/src/config/types.ts
+++ b/src/config/types.ts
@@ -326,7 +326,7 @@ const actionsSchema = z.object({
 });
 
 const elementsBaseSchema = actionsBaseSchema.extend({
-  style: z.record(z.string().nullable()).optional(),
+  style: z.record(z.string().nullable().or(z.undefined())).optional(),
   title: z.string().nullable().optional(),
 });