diff --git a/proto/gen/store/README.md b/proto/gen/store/README.md
index 08e5dc1d..8c058973 100644
--- a/proto/gen/store/README.md
+++ b/proto/gen/store/README.md
@@ -6,6 +6,7 @@
 - [store/activity.proto](#store_activity-proto)
     - [ActivityMemoCommentPayload](#memos-store-ActivityMemoCommentPayload)
     - [ActivityPayload](#memos-store-ActivityPayload)
+    - [ActivityVersionUpdatePayload](#memos-store-ActivityVersionUpdatePayload)
   
 - [store/common.proto](#store_common-proto)
 - [store/inbox.proto](#store_inbox-proto)
@@ -61,6 +62,22 @@
 | Field | Type | Label | Description |
 | ----- | ---- | ----- | ----------- |
 | memo_comment | [ActivityMemoCommentPayload](#memos-store-ActivityMemoCommentPayload) |  |  |
+| version_update | [ActivityVersionUpdatePayload](#memos-store-ActivityVersionUpdatePayload) |  |  |
+
+
+
+
+
+
+<a name="memos-store-ActivityVersionUpdatePayload"></a>
+
+### ActivityVersionUpdatePayload
+
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| version | [string](#string) |  |  |
 
 
 
@@ -126,6 +143,7 @@
 | ---- | ------ | ----------- |
 | TYPE_UNSPECIFIED | 0 |  |
 | TYPE_MEMO_COMMENT | 1 |  |
+| TYPE_VERSION_UPDATE | 2 |  |
 
 
  
diff --git a/proto/gen/store/activity.pb.go b/proto/gen/store/activity.pb.go
index dbf9eb1b..76b2aea2 100644
--- a/proto/gen/store/activity.pb.go
+++ b/proto/gen/store/activity.pb.go
@@ -75,18 +75,66 @@ func (x *ActivityMemoCommentPayload) GetRelatedMemoId() int32 {
 	return 0
 }
 
+type ActivityVersionUpdatePayload struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Version string `protobuf:"bytes,1,opt,name=version,proto3" json:"version,omitempty"`
+}
+
+func (x *ActivityVersionUpdatePayload) Reset() {
+	*x = ActivityVersionUpdatePayload{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_store_activity_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ActivityVersionUpdatePayload) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ActivityVersionUpdatePayload) ProtoMessage() {}
+
+func (x *ActivityVersionUpdatePayload) ProtoReflect() protoreflect.Message {
+	mi := &file_store_activity_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ActivityVersionUpdatePayload.ProtoReflect.Descriptor instead.
+func (*ActivityVersionUpdatePayload) Descriptor() ([]byte, []int) {
+	return file_store_activity_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *ActivityVersionUpdatePayload) GetVersion() string {
+	if x != nil {
+		return x.Version
+	}
+	return ""
+}
+
 type ActivityPayload struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	MemoComment *ActivityMemoCommentPayload `protobuf:"bytes,1,opt,name=memo_comment,json=memoComment,proto3" json:"memo_comment,omitempty"`
+	MemoComment   *ActivityMemoCommentPayload   `protobuf:"bytes,1,opt,name=memo_comment,json=memoComment,proto3" json:"memo_comment,omitempty"`
+	VersionUpdate *ActivityVersionUpdatePayload `protobuf:"bytes,2,opt,name=version_update,json=versionUpdate,proto3" json:"version_update,omitempty"`
 }
 
 func (x *ActivityPayload) Reset() {
 	*x = ActivityPayload{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_store_activity_proto_msgTypes[1]
+		mi := &file_store_activity_proto_msgTypes[2]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -99,7 +147,7 @@ func (x *ActivityPayload) String() string {
 func (*ActivityPayload) ProtoMessage() {}
 
 func (x *ActivityPayload) ProtoReflect() protoreflect.Message {
-	mi := &file_store_activity_proto_msgTypes[1]
+	mi := &file_store_activity_proto_msgTypes[2]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -112,7 +160,7 @@ func (x *ActivityPayload) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ActivityPayload.ProtoReflect.Descriptor instead.
 func (*ActivityPayload) Descriptor() ([]byte, []int) {
-	return file_store_activity_proto_rawDescGZIP(), []int{1}
+	return file_store_activity_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *ActivityPayload) GetMemoComment() *ActivityMemoCommentPayload {
@@ -122,6 +170,13 @@ func (x *ActivityPayload) GetMemoComment() *ActivityMemoCommentPayload {
 	return nil
 }
 
+func (x *ActivityPayload) GetVersionUpdate() *ActivityVersionUpdatePayload {
+	if x != nil {
+		return x.VersionUpdate
+	}
+	return nil
+}
+
 var File_store_activity_proto protoreflect.FileDescriptor
 
 var file_store_activity_proto_rawDesc = []byte{
@@ -133,23 +188,32 @@ var file_store_activity_proto_rawDesc = []byte{
 	0x28, 0x05, 0x52, 0x06, 0x6d, 0x65, 0x6d, 0x6f, 0x49, 0x64, 0x12, 0x26, 0x0a, 0x0f, 0x72, 0x65,
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+	0x33,
 }
 
 var (
@@ -164,18 +228,20 @@ func file_store_activity_proto_rawDescGZIP() []byte {
 	return file_store_activity_proto_rawDescData
 }
 
-var file_store_activity_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_store_activity_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
 var file_store_activity_proto_goTypes = []interface{}{
-	(*ActivityMemoCommentPayload)(nil), // 0: memos.store.ActivityMemoCommentPayload
-	(*ActivityPayload)(nil),            // 1: memos.store.ActivityPayload
+	(*ActivityMemoCommentPayload)(nil),   // 0: memos.store.ActivityMemoCommentPayload
+	(*ActivityVersionUpdatePayload)(nil), // 1: memos.store.ActivityVersionUpdatePayload
+	(*ActivityPayload)(nil),              // 2: memos.store.ActivityPayload
 }
 var file_store_activity_proto_depIdxs = []int32{
 	0, // 0: memos.store.ActivityPayload.memo_comment:type_name -> memos.store.ActivityMemoCommentPayload
-	1, // [1:1] is the sub-list for method output_type
-	1, // [1:1] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
+	1, // 1: memos.store.ActivityPayload.version_update:type_name -> memos.store.ActivityVersionUpdatePayload
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
 }
 
 func init() { file_store_activity_proto_init() }
@@ -197,6 +263,18 @@ func file_store_activity_proto_init() {
 			}
 		}
 		file_store_activity_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ActivityVersionUpdatePayload); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_store_activity_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ActivityPayload); i {
 			case 0:
 				return &v.state
@@ -215,7 +293,7 @@ func file_store_activity_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_store_activity_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   2,
+			NumMessages:   3,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/proto/gen/store/inbox.pb.go b/proto/gen/store/inbox.pb.go
index 50ec5a16..3c33542b 100644
--- a/proto/gen/store/inbox.pb.go
+++ b/proto/gen/store/inbox.pb.go
@@ -23,8 +23,9 @@ const (
 type InboxMessage_Type int32
 
 const (
-	InboxMessage_TYPE_UNSPECIFIED  InboxMessage_Type = 0
-	InboxMessage_TYPE_MEMO_COMMENT InboxMessage_Type = 1
+	InboxMessage_TYPE_UNSPECIFIED    InboxMessage_Type = 0
+	InboxMessage_TYPE_MEMO_COMMENT   InboxMessage_Type = 1
+	InboxMessage_TYPE_VERSION_UPDATE InboxMessage_Type = 2
 )
 
 // Enum value maps for InboxMessage_Type.
@@ -32,10 +33,12 @@ var (
 	InboxMessage_Type_name = map[int32]string{
 		0: "TYPE_UNSPECIFIED",
 		1: "TYPE_MEMO_COMMENT",
+		2: "TYPE_VERSION_UPDATE",
 	}
 	InboxMessage_Type_value = map[string]int32{
-		"TYPE_UNSPECIFIED":  0,
-		"TYPE_MEMO_COMMENT": 1,
+		"TYPE_UNSPECIFIED":    0,
+		"TYPE_MEMO_COMMENT":   1,
+		"TYPE_VERSION_UPDATE": 2,
 	}
 )
 
@@ -126,27 +129,29 @@ var File_store_inbox_proto protoreflect.FileDescriptor
 var file_store_inbox_proto_rawDesc = []byte{
 	0x0a, 0x11, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2f, 0x69, 0x6e, 0x62, 0x6f, 0x78, 0x2e, 0x70, 0x72,
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-	0x65, 0xca, 0x02, 0x0b, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x53, 0x74, 0x6f, 0x72, 0x65, 0xe2,
-	0x02, 0x17, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x53, 0x74, 0x6f, 0x72, 0x65, 0x5c, 0x47, 0x50,
-	0x42, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0xea, 0x02, 0x0c, 0x4d, 0x65, 0x6d, 0x6f,
-	0x73, 0x3a, 0x3a, 0x53, 0x74, 0x6f, 0x72, 0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x12, 0x17, 0x0a, 0x13, 0x54, 0x59, 0x50, 0x45, 0x5f, 0x56, 0x45, 0x52, 0x53, 0x49, 0x4f, 0x4e,
+	0x5f, 0x55, 0x50, 0x44, 0x41, 0x54, 0x45, 0x10, 0x02, 0x42, 0x0e, 0x0a, 0x0c, 0x5f, 0x61, 0x63,
+	0x74, 0x69, 0x76, 0x69, 0x74, 0x79, 0x5f, 0x69, 0x64, 0x42, 0x95, 0x01, 0x0a, 0x0f, 0x63, 0x6f,
+	0x6d, 0x2e, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x42, 0x0a, 0x49,
+	0x6e, 0x62, 0x6f, 0x78, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x29, 0x67, 0x69, 0x74,
+	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x75, 0x73, 0x65, 0x6d, 0x65, 0x6d, 0x6f, 0x73,
+	0x2f, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x65, 0x6e,
+	0x2f, 0x73, 0x74, 0x6f, 0x72, 0x65, 0xa2, 0x02, 0x03, 0x4d, 0x53, 0x58, 0xaa, 0x02, 0x0b, 0x4d,
+	0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x53, 0x74, 0x6f, 0x72, 0x65, 0xca, 0x02, 0x0b, 0x4d, 0x65, 0x6d,
+	0x6f, 0x73, 0x5c, 0x53, 0x74, 0x6f, 0x72, 0x65, 0xe2, 0x02, 0x17, 0x4d, 0x65, 0x6d, 0x6f, 0x73,
+	0x5c, 0x53, 0x74, 0x6f, 0x72, 0x65, 0x5c, 0x47, 0x50, 0x42, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61,
+	0x74, 0x61, 0xea, 0x02, 0x0c, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x3a, 0x3a, 0x53, 0x74, 0x6f, 0x72,
+	0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/proto/store/activity.proto b/proto/store/activity.proto
index d6613bd9..d5c7bdf1 100644
--- a/proto/store/activity.proto
+++ b/proto/store/activity.proto
@@ -9,6 +9,11 @@ message ActivityMemoCommentPayload {
   int32 related_memo_id = 2;
 }
 
+message ActivityVersionUpdatePayload {
+  string version = 1;
+}
+
 message ActivityPayload {
   ActivityMemoCommentPayload memo_comment = 1;
+  ActivityVersionUpdatePayload version_update = 2;
 }
diff --git a/proto/store/inbox.proto b/proto/store/inbox.proto
index f4bd4cf0..6349105a 100644
--- a/proto/store/inbox.proto
+++ b/proto/store/inbox.proto
@@ -8,6 +8,7 @@ message InboxMessage {
   enum Type {
     TYPE_UNSPECIFIED = 0;
     TYPE_MEMO_COMMENT = 1;
+    TYPE_VERSION_UPDATE = 2;
   }
   Type type = 1;
   optional int32 activity_id = 2;
diff --git a/server/server.go b/server/server.go
index 12a87d42..62e89662 100644
--- a/server/server.go
+++ b/server/server.go
@@ -20,6 +20,7 @@ import (
 	"github.com/usememos/memos/server/profile"
 	"github.com/usememos/memos/server/service/backup"
 	"github.com/usememos/memos/server/service/metric"
+	versionchecker "github.com/usememos/memos/server/service/version_checker"
 	"github.com/usememos/memos/store"
 )
 
@@ -109,6 +110,7 @@ func NewServer(ctx context.Context, profile *profile.Profile, store *store.Store
 }
 
 func (s *Server) Start(ctx context.Context) error {
+	go versionchecker.NewVersionChecker(s.Store).Start(ctx)
 	go s.telegramBot.Start(ctx)
 	go s.backupRunner.Run(ctx)
 
diff --git a/server/service/version_checker/version_checker.go b/server/service/version_checker/version_checker.go
new file mode 100644
index 00000000..73494261
--- /dev/null
+++ b/server/service/version_checker/version_checker.go
@@ -0,0 +1,142 @@
+package versionchecker
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/pkg/errors"
+
+	storepb "github.com/usememos/memos/proto/gen/store"
+	"github.com/usememos/memos/server/version"
+	"github.com/usememos/memos/store"
+)
+
+// nolint
+type VersionChecker struct {
+	Store *store.Store
+}
+
+func NewVersionChecker(store *store.Store) *VersionChecker {
+	return &VersionChecker{
+		Store: store,
+	}
+}
+
+func (*VersionChecker) GetLatestVersion() (string, error) {
+	response, err := http.Get("https://www.usememos.com/api/version")
+	if err != nil {
+		return "", errors.Wrap(err, "failed to make http request")
+	}
+	defer response.Body.Close()
+
+	buf := &bytes.Buffer{}
+	_, err = buf.ReadFrom(response.Body)
+	if err != nil {
+		return "", errors.Wrap(err, "fail to read response body")
+	}
+
+	version := ""
+	if err = json.Unmarshal(buf.Bytes(), &version); err != nil {
+		return "", errors.Wrap(err, "fail to unmarshal get version response")
+	}
+	return version, nil
+}
+
+func (c *VersionChecker) Check(ctx context.Context) {
+	migrationHistories, err := c.Store.FindMigrationHistoryList(ctx, &store.FindMigrationHistory{})
+	if err != nil {
+		return
+	}
+	if len(migrationHistories) == 0 {
+		return
+	}
+
+	lastVersion := migrationHistories[0].Version
+	latestVersion, err := c.GetLatestVersion()
+	if err != nil {
+		return
+	}
+	if !version.IsVersionGreaterThan(latestVersion, lastVersion) {
+		return
+	}
+
+	versionUpdateActivityType := store.ActivityTypeVersionUpdate
+	list, err := c.Store.ListActivities(ctx, &store.FindActivity{
+		Type: &versionUpdateActivityType,
+	})
+	if err != nil {
+		return
+	}
+	if len(list) == 0 {
+		return
+	}
+
+	latestVersionUpdateActivity := list[0]
+	if latestVersionUpdateActivity.Payload == nil {
+		return
+	}
+	if version.IsVersionGreaterOrEqualThan(latestVersionUpdateActivity.Payload.VersionUpdate.Version, latestVersion) {
+		return
+	}
+
+	// Create version update activity and inbox message.
+	activity := &store.Activity{
+		CreatorID: store.SystemBotID,
+		Type:      store.ActivityTypeVersionUpdate,
+		Level:     store.ActivityLevelInfo,
+		Payload: &storepb.ActivityPayload{
+			VersionUpdate: &storepb.ActivityVersionUpdatePayload{
+				Version: latestVersion,
+			},
+		},
+	}
+	if _, err := c.Store.CreateActivity(ctx, activity); err != nil {
+		return
+	}
+
+	hostUserRole := store.RoleHost
+	users, err := c.Store.ListUsers(ctx, &store.FindUser{
+		Role: &hostUserRole,
+	})
+	if err != nil {
+		return
+	}
+	if len(users) == 0 {
+		return
+	}
+
+	hostUser := users[0]
+	if _, err := c.Store.CreateInbox(ctx, &store.Inbox{
+		SenderID:   store.SystemBotID,
+		ReceiverID: hostUser.ID,
+		Status:     store.UNREAD,
+		Message: &storepb.InboxMessage{
+			Type:       storepb.InboxMessage_TYPE_VERSION_UPDATE,
+			ActivityId: &activity.ID,
+		},
+	}); err != nil {
+		fmt.Printf("failed to create inbox: %s\n", err)
+	}
+}
+
+func (c *VersionChecker) Start(ctx context.Context) {
+	c.Check(ctx)
+
+	// Schedule checker every 8 hours.
+	ticker := time.NewTicker(8 * time.Hour)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-ticker.C:
+		}
+
+		c.Check(ctx)
+	}
+}
diff --git a/server/service/version_checker/version_checker_test.go b/server/service/version_checker/version_checker_test.go
new file mode 100644
index 00000000..9ddde295
--- /dev/null
+++ b/server/service/version_checker/version_checker_test.go
@@ -0,0 +1,12 @@
+package versionchecker
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetLatestVersion(t *testing.T) {
+	_, err := NewVersionChecker(nil).GetLatestVersion()
+	require.NoError(t, err)
+}
diff --git a/store/activity.go b/store/activity.go
index 3da43db5..59078e21 100644
--- a/store/activity.go
+++ b/store/activity.go
@@ -9,7 +9,8 @@ import (
 type ActivityType string
 
 const (
-	ActivityTypeMemoComment ActivityType = "MEMO_COMMENT"
+	ActivityTypeMemoComment   ActivityType = "MEMO_COMMENT"
+	ActivityTypeVersionUpdate ActivityType = "VERSION_UPDATE"
 )
 
 func (t ActivityType) String() string {
@@ -40,7 +41,8 @@ type Activity struct {
 }
 
 type FindActivity struct {
-	ID *int32
+	ID   *int32
+	Type *ActivityType
 }
 
 func (s *Store) CreateActivity(ctx context.Context, create *Activity) (*Activity, error) {
diff --git a/store/db/mysql/activity.go b/store/db/mysql/activity.go
index 075aed0f..4bd0bd28 100644
--- a/store/db/mysql/activity.go
+++ b/store/db/mysql/activity.go
@@ -63,8 +63,11 @@ func (d *DB) ListActivities(ctx context.Context, find *store.FindActivity) ([]*s
 	if find.ID != nil {
 		where, args = append(where, "`id` = ?"), append(args, *find.ID)
 	}
+	if find.Type != nil {
+		where, args = append(where, "`type` = ?"), append(args, find.Type.String())
+	}
 
-	query := "SELECT `id`, `creator_id`, `type`, `level`, `payload`, UNIX_TIMESTAMP(`created_ts`) FROM `activity` WHERE " + strings.Join(where, " AND ")
+	query := "SELECT `id`, `creator_id`, `type`, `level`, `payload`, UNIX_TIMESTAMP(`created_ts`) FROM `activity` WHERE " + strings.Join(where, " AND ") + " ORDER BY `created_ts` DESC"
 	rows, err := d.db.QueryContext(ctx, query, args...)
 	if err != nil {
 		return nil, err
diff --git a/store/db/sqlite/activity.go b/store/db/sqlite/activity.go
index 1853df1e..84e5a512 100644
--- a/store/db/sqlite/activity.go
+++ b/store/db/sqlite/activity.go
@@ -54,8 +54,11 @@ func (d *DB) ListActivities(ctx context.Context, find *store.FindActivity) ([]*s
 	if find.ID != nil {
 		where, args = append(where, "`id` = ?"), append(args, *find.ID)
 	}
+	if find.Type != nil {
+		where, args = append(where, "`type` = ?"), append(args, find.Type.String())
+	}
 
-	query := "SELECT `id`, `creator_id`, `type`, `level`, `payload`, `created_ts` FROM `activity` WHERE " + strings.Join(where, " AND ")
+	query := "SELECT `id`, `creator_id`, `type`, `level`, `payload`, `created_ts` FROM `activity` WHERE " + strings.Join(where, " AND ") + " ORDER BY `created_ts` DESC"
 	rows, err := d.db.QueryContext(ctx, query, args...)
 	if err != nil {
 		return nil, err
diff --git a/store/user.go b/store/user.go
index 6afd9dfb..4dcda4f6 100644
--- a/store/user.go
+++ b/store/user.go
@@ -28,6 +28,20 @@ func (e Role) String() string {
 	return "USER"
 }
 
+const (
+	SystemBotID int32 = 0
+)
+
+var (
+	SystemBot = &User{
+		ID:       SystemBotID,
+		Username: "system_bot",
+		Role:     RoleAdmin,
+		Email:    "",
+		Nickname: "Bot",
+	}
+)
+
 type User struct {
 	ID int32
 
@@ -106,6 +120,10 @@ func (s *Store) ListUsers(ctx context.Context, find *FindUser) ([]*User, error)
 
 func (s *Store) GetUser(ctx context.Context, find *FindUser) (*User, error) {
 	if find.ID != nil {
+		if *find.ID == SystemBotID {
+			return SystemBot, nil
+		}
+
 		if cache, ok := s.userCache.Load(*find.ID); ok {
 			return cache.(*User), nil
 		}