diff --git a/src/idz/decoder.ts b/src/idz/decoder.ts
index 58c2da6..07df349 100644
--- a/src/idz/decoder.ts
+++ b/src/idz/decoder.ts
@@ -135,6 +135,13 @@ readers.set(MSG.GET_TEAM_REQ, buf => {
   };
 });
 
+readers.set(MSG.UPDATE_EXPEDITION_REQ, buf => {
+  return {
+    type: "update_expedition_req",
+    field_0004: buf.readUInt32LE(0x0004),
+  };
+});
+
 readers.set(MSG.UPDATE_PROVISIONAL_STORE_RANK_REQ, buf => {
   return {
     type: "update_provisional_store_rank_req",
diff --git a/src/idz/defs.ts b/src/idz/defs.ts
index 66cce82..ad6d421 100644
--- a/src/idz/defs.ts
+++ b/src/idz/defs.ts
@@ -25,6 +25,8 @@ export const MSG = {
   UPDATE_PROVISIONAL_STORE_RANK_RES: 0x0083,
   GET_REWARD_TABLE_REQ: 0x0086,
   GET_REWARD_TABLE_RES: 0x0087,
+  UPDATE_EXPEDITION_REQ: 0x008c,
+  UPDATE_EXPEDITION_RES: 0x008d,
   UPDATE_TOPIC_REQ: 0x009a,
   UPDATE_TOPIC_RES: 0x009b,
   GET_GENERAL_REWARD_REQ: 0x009c,
@@ -53,6 +55,7 @@ REQ_LEN.set(MSG.GET_REWARD_TABLE_REQ, 0x0010);
 REQ_LEN.set(MSG.GET_SERVER_LIST_REQ, 0x0020);
 REQ_LEN.set(MSG.GET_STOCKER_REQ, 0x0010);
 REQ_LEN.set(MSG.GET_TEAM_REQ, 0x0010);
+REQ_LEN.set(MSG.UPDATE_EXPEDITION_REQ, 0x0010);
 REQ_LEN.set(MSG.UPDATE_PROVISIONAL_STORE_RANK_REQ, 0x0010);
 REQ_LEN.set(MSG.UPDATE_RECORD_REQ, 0x0940);
 REQ_LEN.set(MSG.UPDATE_STORY_CLEAR_NUM_REQ, 0x0010);
diff --git a/src/idz/encoder.ts b/src/idz/encoder.ts
index 625a34b..1009a66 100644
--- a/src/idz/encoder.ts
+++ b/src/idz/encoder.ts
@@ -123,7 +123,12 @@ export class Encoder extends Transform {
 
       case "get_record_v2_res":
         buf = Buffer.alloc(0x0d30);
-        //buf.fill(1, 0x0000, 0x0698); // -------- SPRAYING -----------
+        //buf.fill(1, 0x01a6, 0x0279); // -------- SPRAYING -----------
+
+        for (let i = 0x1a; i < 0x26; i++) {
+          //buf.writeUInt8(1, 0x0206 + i);
+        }
+
         buf.writeUInt16LE(MSG.GET_RECORD_V2_RES, 0x0000);
         buf.writeUInt32LE(obj.teamId, 4 + 0x3b4);
         buf.writeUInt16LE(obj.lv, 4 + 0x03c8);
@@ -174,6 +179,13 @@ export class Encoder extends Transform {
 
         break;
 
+      case "update_expedition_res":
+        buf = Buffer.alloc(0x17c0);
+        buf.writeUInt16LE(MSG.UPDATE_EXPEDITION_RES, 0x0000);
+        // in awe of the size of this lad
+
+        break;
+
       case "update_provisional_store_rank_res":
         buf = Buffer.alloc(0x02b0);
         buf.writeUInt16LE(MSG.UPDATE_PROVISIONAL_STORE_RANK_RES, 0x0000);
diff --git a/src/idz/index.ts b/src/idz/index.ts
index d1965ba..866019b 100644
--- a/src/idz/index.ts
+++ b/src/idz/index.ts
@@ -174,6 +174,20 @@ export default async function idz(socket: Socket) {
 
           break;
 
+        case "update_expedition_req":
+          if (msg.field_0004 === 0) {
+            output.write({
+              type: "generic_res",
+              status: 0,
+            });
+          } else {
+            output.write({
+              type: "update_expedition_res",
+            });
+          }
+
+          break;
+
         case "update_provisional_store_rank_req":
           output.write({
             type: "update_provisional_store_rank_res",
diff --git a/src/idz/request.ts b/src/idz/request.ts
index 3db8a0e..68e68cc 100644
--- a/src/idz/request.ts
+++ b/src/idz/request.ts
@@ -94,6 +94,11 @@ export interface GetTeamRequest {
   field_0008: number;
 }
 
+export interface UpdateExpeditionRequest {
+  type: "update_expedition_req";
+  field_0004: number;
+}
+
 export interface UpdateProvisionalStoreRankRequest {
   type: "update_provisional_store_rank_req";
   aimeId: number;
@@ -128,6 +133,7 @@ export type Request =
   | GetServerListRequest
   | GetStockerRequest
   | GetTeamRequest
+  | UpdateExpeditionRequest
   | UpdateProvisionalStoreRankRequest
   | UpdateRecordRequest
   | UpdateStoryClearNumRequest
diff --git a/src/idz/response.ts b/src/idz/response.ts
index e6c38b3..47cd2bd 100644
--- a/src/idz/response.ts
+++ b/src/idz/response.ts
@@ -29,6 +29,7 @@ export interface AccountUnlockResponse {
 export interface GenericResponse {
   type: "generic_res";
   status: number;
+  // a bunch of other stuff here! total size is 0x20
 }
 
 export interface CreateTeamResponse extends BaseTeamResponse {
@@ -130,6 +131,11 @@ export interface GetTeamResponse extends BaseTeamResponse {
   type: "get_team_res";
 }
 
+export interface UpdateExpeditionResponse {
+  type: "update_expedition_res";
+  // tera TODO
+}
+
 export interface UpdateProvisionalStoreRankResponseRow {
   field_0000: number;
   field_0004: number;
@@ -168,6 +174,7 @@ export type Response =
   | GetServerListResponse
   | GetStockerResponse
   | GetTeamResponse
+  | UpdateExpeditionResponse
   | UpdateProvisionalStoreRankResponse
   | UpdateStoryClearNumResponse
   | UpdateTopicResponse;