diff --git a/cmd/felis/node_approve.go b/cmd/felis/node_approve.go
index acbf1e5..59bc312 100644
--- a/cmd/felis/node_approve.go
+++ b/cmd/felis/node_approve.go
@@ -275,7 +275,7 @@ func approveNode(ctx context.Context, cl client.Client, cs kubernetes.Interface,
 	for _, endpoint := range endpoints {
 		c, err := net.DialTimeout("tcp", endpoint, 5*time.Second)
 		if err != nil {
-			return fmt.Errorf("Velocity host cannot dial backend Service %s: %w", endpoint, err)
+			return fmt.Errorf("velocity host cannot dial backend Service %s: %w", endpoint, err)
 		}
 		c.Close()
 	}
@@ -321,7 +321,7 @@ func approveNode(ctx context.Context, cl client.Client, cs kubernetes.Interface,
 		return err
 	}
 	if len(game.Spec.Ingress) == 0 {
-		return fmt.Errorf("Velocity ingress policy is not configured")
+		return fmt.Errorf("velocity ingress policy is not configured")
 	}
 	prevGame := game.DeepCopy()
 	for _, cidr := range observed {
diff --git a/cmd/felis/server_migrate.go b/cmd/felis/server_migrate.go
index a9329ad..3e91cd7 100644
--- a/cmd/felis/server_migrate.go
+++ b/cmd/felis/server_migrate.go
@@ -76,19 +76,19 @@ func cmdServerMigrate(args []string, stdout, stderr io.Writer) int {
 	var op distributed.Operation
 	switch args[0] {
 	case "start":
-		host, err := config.Load(*cfgPath)
-		if err != nil {
-			fmt.Fprintln(stderr, err)
+		host, cfgErr := config.Load(*cfgPath)
+		if cfgErr != nil {
+			fmt.Fprintln(stderr, cfgErr)
 			return 1
 		}
-		drv, err := openPodStore(ctx, host.Database.URL, "migration", stderr)
-		if err != nil {
-			fmt.Fprintln(stderr, err)
+		drv, dbErr := openPodStore(ctx, host.Database.URL, "migration", stderr)
+		if dbErr != nil {
+			fmt.Fprintln(stderr, dbErr)
 			return 1
 		}
 		defer drv.Close()
 		var owner sql.NullString
-		if err = drv.DB().QueryRowContext(ctx, "SELECT owner_id FROM servers WHERE name=$1 AND deleted_at IS NULL AND retire_requested_at IS NULL", *name).Scan(&owner); err != nil {
+		if err := drv.DB().QueryRowContext(ctx, "SELECT owner_id FROM servers WHERE name=$1 AND deleted_at IS NULL AND retire_requested_at IS NULL", *name).Scan(&owner); err != nil {
 			fmt.Fprintln(stderr, err)
 			return 1
 		}
diff --git a/internal/archivetransfer/transfer.go b/internal/archivetransfer/transfer.go
index 5d90ed0..7342b3a 100644
--- a/internal/archivetransfer/transfer.go
+++ b/internal/archivetransfer/transfer.go
@@ -129,7 +129,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 	if r.URL.Path == "/archives" && r.Method == http.MethodDelete {
 		if len(s.Key) < 32 || !hmac.Equal([]byte(strings.TrimPrefix(r.Header.Get("Authorization"), "Bearer ")), []byte(s.Key)) {
-			http.Error(w, "unauthorized", 401)
+			http.Error(w, "unauthorized", http.StatusUnauthorized)
 			return
 		}
 		var q struct {
@@ -152,7 +152,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 	if r.URL.Path == "/inspect" && r.Method == http.MethodPost {
 		if len(s.Key) < 32 || !hmac.Equal([]byte(strings.TrimPrefix(r.Header.Get("Authorization"), "Bearer ")), []byte(s.Key)) {
-			http.Error(w, "unauthorized", 401)
+			http.Error(w, "unauthorized", http.StatusUnauthorized)
 			return
 		}
 		var q struct {
@@ -165,7 +165,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		local := &backup.TarLocal{BackupRoot: s.Root}
 		sum, err := local.Verify(r.Context(), backup.ArchiveRef(q.Ref), "")
 		if err != nil {
-			http.Error(w, "archive is absent or corrupt", 422)
+			http.Error(w, "archive is absent or corrupt", http.StatusUnprocessableEntity)
 			return
 		}
 		st, err := os.Stat(q.Ref)
@@ -347,7 +347,7 @@ func (s *Server) upload(r *http.Request, t Ticket) error {
 func (s *Server) download(w http.ResponseWriter, r *http.Request, t Ticket) {
 	root, err := os.OpenRoot(s.Root)
 	if err != nil {
-		http.Error(w, "archive unavailable", 503)
+		http.Error(w, "archive unavailable", http.StatusServiceUnavailable)
 		return
 	}
 	defer root.Close()
@@ -359,7 +359,7 @@ func (s *Server) download(w http.ResponseWriter, r *http.Request, t Ticket) {
 	defer f.Close()
 	st, err := f.Stat()
 	if err != nil || !st.Mode().IsRegular() || st.Size() > t.Limit {
-		http.Error(w, "archive exceeds transfer bounds", 413)
+		http.Error(w, "archive exceeds transfer bounds", http.StatusRequestEntityTooLarge)
 		return
 	}
 	w.Header().Set("Content-Type", "application/gzip")
diff --git a/internal/backup/verify_restored.go b/internal/backup/verify_restored.go
index d0c8742..e3c8f14 100644
--- a/internal/backup/verify_restored.go
+++ b/internal/backup/verify_restored.go
@@ -41,7 +41,7 @@ func VerifyRestored(ctx context.Context, ref, world string) error {
 		if err != nil {
 			return err
 		}
-		if h.Typeflag != tar.TypeReg && h.Typeflag != tar.TypeRegA {
+		if h.Typeflag != tar.TypeReg {
 			continue
 		}
 		dst, err := root.Open(h.Name)