diff --git a/packages/board/src/api/ograph-client.ts b/packages/board/src/api/ograph-client.ts
index c2e60c9..ff2ea4c 100644
--- a/packages/board/src/api/ograph-client.ts
+++ b/packages/board/src/api/ograph-client.ts
@@ -132,7 +132,7 @@ export class OGraphClient implements TaskAPI {
       body: JSON.stringify({
         type: "task_created",
         payload: {
-          subject: { ref: obj.id },
+          subject: obj.id,
           title: data.title,
           priority: data.priority ?? "p2",
           ...(data.description ? { description: data.description } : {}),
@@ -147,8 +147,8 @@ export class OGraphClient implements TaskAPI {
         body: JSON.stringify({
           type: "task_assigned",
           payload: {
-            subject: { ref: obj.id },
-            assignee: { ref: data.assigneeId },
+            subject: obj.id,
+            assignee: data.assigneeId,
           },
         }),
       })
@@ -162,7 +162,7 @@ export class OGraphClient implements TaskAPI {
         body: JSON.stringify({
           type: "task_status_changed",
           payload: {
-            subject: { ref: obj.id },
+            subject: obj.id,
             status,
           },
         }),
@@ -194,7 +194,7 @@ export class OGraphClient implements TaskAPI {
           body: JSON.stringify({
             type: "task_status_changed",
             payload: {
-              subject: { ref: id },
+              subject: id,
               status: data.status,
             },
           }),
@@ -209,8 +209,8 @@ export class OGraphClient implements TaskAPI {
           body: JSON.stringify({
             type: "task_assigned",
             payload: {
-              subject: { ref: id },
-              assignee: data.assigneeId ? { ref: data.assigneeId } : null,
+              subject: id,
+              assignee: data.assigneeId ?? null,
             },
           }),
         })
@@ -241,7 +241,7 @@ export class OGraphClient implements TaskAPI {
       body: JSON.stringify({
         type: "task_status_changed",
         payload: {
-          subject: { ref: _id },
+          subject: _id,
           status: "done",
         },
       }),
@@ -254,7 +254,7 @@ export class OGraphClient implements TaskAPI {
       body: JSON.stringify({
         type: "task_status_changed",
         payload: {
-          subject: { ref: id },
+          subject: id,
           status,
         },
       }),