diff --git a/core/db_tkrzw.go b/core/db_tkrzw.go
deleted file mode 100644
index b7a6cfe..0000000
--- a/core/db_tkrzw.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package core
-
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"log"
-	"os"
-	"path"
-	"sort"
-	"sync"
-	"time"
-
-	"github.com/oklog/ulid/v2"
-	"github.com/estraier/tkrzw-go"
-
-	. "git.exozy.me/exozyme/status/scanner" 
-)
-
-type Tkrzw struct {
-	*tkrzw.DBM
-}
-
-func OpenTkrzw(dir string) (Database, error) {
-	dbm := tkrzw.NewDBM()
-	status := dbm.Open(path.Join(dir, "casket.tks"), true, map[string]string{})
-	if !status.IsOK() {
-		return nil, status
-	}
-	return &Tkrzw{DBM: dbm}, nil
-	// dbm.Rebuild()
-}
-
-func (dbm *Tkrzw) Persist() error {
-	status := dbm.Synchronize(true, map[string]string{})
-	if !status.IsOK() {
-		return status
-	}
-	return nil
-}
-
-func (dbm *Tkrzw) QueryAllAfter(cutoff time.Time) ([]Row, error) {
-	panic("not implemented") // TODO: Implement
-}
-
-func (dbm *Tkrzw) StoreServiceStatusBatch(entries ServiceStatusBatch, when time.Time) ([]ServiceStatus, error) {
-	panic("not implemented") // TODO: Implement
-}
-
-func (dbm *Tkrzw) StoreSelfStatus(status EventType, when time.Time) error {
-	panic("not implemented") // TODO: Implement
-}
-
diff --git a/go.mod b/go.mod
index 65bf373..de9f768 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,6 @@ go 1.21.1
 
 require (
 	github.com/cbroglie/mustache v1.4.0
-	github.com/estraier/tkrzw-go v0.0.0-20240603165139-89707b45d5ab
 	github.com/oklog/ulid/v2 v2.1.0
 	github.com/pelletier/go-toml/v2 v2.1.0
 	github.com/prometheus-community/pro-bing v0.3.0
diff --git a/go.sum b/go.sum
index 8de935f..6a6eb6e 100644
--- a/go.sum
+++ b/go.sum
@@ -4,8 +4,6 @@ github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSV
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/estraier/tkrzw-go v0.0.0-20240603165139-89707b45d5ab h1:yQbaZGVW+i4XGqOCmngDuuusApVBBqIDPaLMI6JOyXU=
-github.com/estraier/tkrzw-go v0.0.0-20240603165139-89707b45d5ab/go.mod h1:vUOsQ39pa/SuhSmt/Nj+FiNFEHhGf58xM61e0EfZQcc=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
 github.com/google/uuid v1.3.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=