diff --git a/src/types/custom-relationships.d.ts b/src/types/custom-relationships.d.ts
index a3d958c..f2c2e6c 100644
--- a/src/types/custom-relationships.d.ts
+++ b/src/types/custom-relationships.d.ts
@@ -13,6 +13,7 @@ export interface CustomRelationshipBaseAttributes {
   name: string
   description?: string
   slug: string
+  bi_directional: boolean
 }
 
 export interface CustomRelationshipBase {