diff --git a/packages/better-auth/src/plugins/api-key/schema.ts b/packages/better-auth/src/plugins/api-key/schema.ts
index 212112b99d..087e6511a8 100644
--- a/packages/better-auth/src/plugins/api-key/schema.ts
+++ b/packages/better-auth/src/plugins/api-key/schema.ts
@@ -49,7 +49,7 @@ export const apiKeySchema = ({
 				 */
 				userId: {
 					type: "string",
-					references: { model: "user", field: "id" },
+					references: { model: "user", field: "id", onDelete: "cascade" },
 					required: true,
 					input: false,
 				},