diff --git a/main_test.go b/main_test.go
index 1111c75..6ce3a3d 100644
--- a/main_test.go
+++ b/main_test.go
@@ -3,6 +3,7 @@ package main_test
 import (
 	"context"
 	main "show-rss"
+	"show-rss/src/db"
 	"testing"
 	"time"
 )
@@ -11,7 +12,7 @@ func TestMain(t *testing.T) {
 	ctx, can := context.WithTimeout(context.Background(), 2*time.Second)
 	defer can()
 
-	if err := main.Main(ctx); err != nil && ctx.Err() == nil {
+	if err := main.Main(db.Test(t, ctx)); err != nil && ctx.Err() == nil {
 		t.Fatal(err)
 	}
 }
diff --git a/src/cmd/config.go b/src/cmd/config.go
index 1e99165..391f70b 100644
--- a/src/cmd/config.go
+++ b/src/cmd/config.go
@@ -2,14 +2,17 @@ package cmd
 
 import (
 	"context"
+	"show-rss/src/cleanup"
 	"show-rss/src/db"
 )
 
-func Config(ctx context.Context) (context.Context, error) {
+func Config(ctx context.Context) (context.Context, func(), error) {
 	ctx, err := db.Inject(ctx, "/tmp/f.db")
 	if err != nil {
-		return ctx, err
+		return ctx, nil, err
 	}
 
-	return ctx, nil
+	return ctx, func() {
+		cleanup.Extract(ctx)()
+	}, nil
 }
diff --git a/src/cmd/cron/main.go b/src/cmd/cron/main.go
index f6d81ca..2ce8bc2 100644
--- a/src/cmd/cron/main.go
+++ b/src/cmd/cron/main.go
@@ -2,8 +2,9 @@ package cron
 
 import (
 	"context"
-	"io"
+	"fmt"
 	"show-rss/src/db"
+	"strings"
 	"time"
 )
 
@@ -11,7 +12,7 @@ func Main(ctx context.Context) error {
 	c := time.NewTicker(time.Minute)
 	defer c.Stop()
 	for {
-		if err := one(ctx); err != nil {
+		if err := One(ctx); err != nil {
 			return err
 		}
 
@@ -23,19 +24,49 @@ func Main(ctx context.Context) error {
 	return ctx.Err()
 }
 
-func one(ctx context.Context) error {
+func One(ctx context.Context) error {
 	if err := initDB(ctx); err != nil {
-		return err
+		return fmt.Errorf("failed init db: %w", err)
 	}
-	return io.EOF
+	return nil
 }
 
 func initDB(ctx context.Context) error {
-	return db.Exec(ctx, `
-		CREATE TABLE IF NOT EXISTS feeds (
-			id SERIAL
-		);
-		ALTER TABLE feeds ADD COLUMN IF NOT EXISTS b TEXT;
-		ALTER TABLE feeds ADD COLUMN IF NOT EXISTS b TEXT;
-	`)
+	if err := db.Exec(ctx, `CREATE TABLE IF NOT EXISTS database_version (v NUMBER, t TIMESTAMP)`); err != nil {
+		return fmt.Errorf("failed to create database_version table: %w", err)
+	}
+
+	type DatabaseVersion struct {
+		V int       `json:"v"`
+		T time.Time `json:"t"`
+	}
+	vs, err := db.Query[DatabaseVersion](ctx, `SELECT v, t FROM database_version ORDER BY v DESC LIMIT 1`)
+	if err != nil {
+		return err
+	}
+	var v DatabaseVersion
+	if len(vs) > 0 {
+		v = vs[0]
+	}
+
+	mods := []string{
+		`CREATE TABLE feeds (
+			id SERIAL PRIMARY KEY NOT NULL,
+			created_at TIMESTAMP,
+			updated_at TIMESTAMP,
+			deleted_at TIMESTAMP
+		)`,
+	}
+	mods = append([]string{""}, mods...)
+	for i := v.V + 1; i < len(mods); i++ {
+		q := mods[i]
+		q = strings.TrimSpace(q)
+		q = strings.TrimSuffix(q, ";")
+		q = fmt.Sprintf("BEGIN; %s; INSERT INTO database_version (v, t) VALUES (?, ?); COMMIT;", q)
+		if err := db.Exec(ctx, q, i, time.Now()); err != nil {
+			return fmt.Errorf("[%d] failed mod %s: %w", i, mods[i], err)
+		}
+	}
+
+	return nil
 }
diff --git a/src/cmd/cron/main_test.go b/src/cmd/cron/main_test.go
new file mode 100644
index 0000000..90d43a1
--- /dev/null
+++ b/src/cmd/cron/main_test.go
@@ -0,0 +1,36 @@
+package cron_test
+
+import (
+	"context"
+	"show-rss/src/cmd/cron"
+	"show-rss/src/db"
+	"strconv"
+	"testing"
+	"time"
+)
+
+func TestOne(t *testing.T) {
+	ctx, can := context.WithTimeout(context.Background(), 5*time.Second)
+	defer can()
+
+	t.Run("same ctx", func(t *testing.T) {
+		ctx := db.Test(t, ctx)
+		for i := 0; i < 2; i++ {
+			t.Run(strconv.Itoa(i), func(t *testing.T) {
+				if err := cron.One(ctx); err != nil && ctx.Err() == nil {
+					t.Fatalf("failed %d: %v", i, err)
+				}
+			})
+		}
+	})
+
+	t.Run("new ctx", func(t *testing.T) {
+		for i := 0; i < 2; i++ {
+			t.Run(strconv.Itoa(i), func(t *testing.T) {
+				if err := cron.One(db.Test(t, ctx)); err != nil && ctx.Err() == nil {
+					t.Fatalf("failed %d: %v", i, err)
+				}
+			})
+		}
+	})
+}
diff --git a/src/cmd/main.go b/src/cmd/main.go
index 3467860..950cdd7 100644
--- a/src/cmd/main.go
+++ b/src/cmd/main.go
@@ -14,10 +14,11 @@ func Main(ctx context.Context) error {
 	ctx, can := context.WithCancel(ctx)
 	defer can()
 
-	ctx, err := Config(ctx)
+	ctx, can, err := Config(ctx)
 	if err != nil {
 		return fmt.Errorf("failed to inject: %w", err)
 	}
+	defer can()
 
 	foos := map[string]func(context.Context) error{
 		"server": server.Main,
diff --git a/src/db/ctx.go b/src/db/ctx.go
index 7a6ede9..0909bc1 100644
--- a/src/db/ctx.go
+++ b/src/db/ctx.go
@@ -3,6 +3,9 @@ package db
 import (
 	"context"
 	"fmt"
+	"path"
+	"strings"
+	"testing"
 	"time"
 
 	"database/sql"
@@ -14,7 +17,27 @@ import (
 
 const ctxKey = "__db"
 
+func Test(t *testing.T, ctx context.Context) context.Context {
+	p := path.Join(t.TempDir(), strings.ReplaceAll(t.Name()+".db", "/", "_"))
+	ctx, err := Inject(ctx, p)
+	if err != nil {
+		t.Fatalf("failed to inject db %s: %v", p, err)
+	}
+	t.Cleanup(func() {
+		db, err := extract(ctx)
+		if err != nil {
+			return
+		}
+		db.Close()
+	})
+	return ctx
+}
+
 func Inject(ctx context.Context, conn string) (context.Context, error) {
+	if _, err := extract(ctx); err == nil {
+		return ctx, nil
+	}
+
 	connctx, can := context.WithTimeout(ctx, 15*time.Second)
 	defer can()