diff --git a/lib/types/dm-ops.js b/lib/types/dm-ops.js
--- a/lib/types/dm-ops.js
+++ b/lib/types/dm-ops.js
@@ -5,6 +5,7 @@
 import { clientAvatarValidator, type ClientAvatar } from './avatar-types.js';
 import { type Media, mediaValidator } from './media-types.js';
 import type { RawMessageInfo } from './message-types.js';
+import type { RelationshipOperation } from './messages/update-relationship.js';
 import type { NotificationsCreationData } from './notif-types.js';
 import type { OutboundP2PMessage } from './sqlite-types.js';
 import {
@@ -43,6 +44,7 @@
   CREATE_ENTRY: 'create_entry',
   DELETE_ENTRY: 'delete_entry',
   EDIT_ENTRY: 'edit_entry',
+  UPDATE_RELATIONSHIP: 'update_relationship',
 });
 export type DMOperationType = $Values<typeof dmOperationTypes>;
 
@@ -448,6 +450,29 @@
     messageID: t.String,
   });
 
+export type DMUpdateRelationshipOperation = {
+  +type: 'update_relationship',
+  +threadID: string,
+  +creatorID: string,
+  +time: number,
+  +operation: RelationshipOperation,
+  +messageID: string,
+};
+
+export const dmUpdateRelationshipOperationValidator: TInterface<DMUpdateRelationshipOperation> =
+  tShape<DMUpdateRelationshipOperation>({
+    type: tString(dmOperationTypes.UPDATE_RELATIONSHIP),
+    threadID: t.String,
+    creatorID: t.String,
+    time: t.Number,
+    operation: t.enums.of([
+      'request_sent',
+      'request_accepted',
+      'farcaster_mutual',
+    ]),
+    messageID: t.String,
+  });
+
 export type DMOperation =
   | DMCreateThreadOperation
   | DMCreateSidebarOperation
@@ -465,7 +490,8 @@
   | DMChangeThreadReadStatusOperation
   | DMCreateEntryOperation
   | DMDeleteEntryOperation
-  | DMEditEntryOperation;
+  | DMEditEntryOperation
+  | DMUpdateRelationshipOperation;
 export const dmOperationValidator: TUnion<DMOperation> = t.union([
   dmCreateThreadOperationValidator,
   dmCreateSidebarOperationValidator,
@@ -484,6 +510,7 @@
   dmCreateEntryOperationValidator,
   dmDeleteEntryOperationValidator,
   dmEditEntryOperationValidator,
+  dmUpdateRelationshipOperationValidator,
 ]);
 
 export type DMOperationResult = {
diff --git a/lib/types/messages/update-relationship.js b/lib/types/messages/update-relationship.js
--- a/lib/types/messages/update-relationship.js
+++ b/lib/types/messages/update-relationship.js
@@ -18,6 +18,10 @@
 
 export type FarcasterRelationshipOperation = 'farcaster_mutual';
 
+export type RelationshipOperation =
+  | TraditionalRelationshipOperation
+  | FarcasterRelationshipOperation;
+
 export type UpdateTraditionalRelationshipMessageData = {
   +type: 22,
   +threadID: string,