diff --git a/core/genesis.go b/core/genesis.go
index afedffc06..66080f42c 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -26,7 +26,6 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
-	"os"
 	"sync"
 
 	"github.com/c2h5oh/datasize"
@@ -93,14 +92,6 @@ type AuthorityRoundSeal struct {
 	Signature libcommon.Hash `json:"signature"`
 }
 
-var genesisTmpDB kv.RwDB
-var genesisDBLock *sync.Mutex
-
-func init() {
-	genesisTmpDB = mdbx.NewMDBX(log.New()).InMem(os.TempDir()).MapSize(2 * datasize.GB).PageSize(2 * 4096).MustOpen()
-	genesisDBLock = &sync.Mutex{}
-}
-
 func (ga *GenesisAlloc) UnmarshalJSON(data []byte) error {
 	m := make(map[common.UnprefixedAddress]GenesisAccount)
 	if err := json.Unmarshal(data, &m); err != nil {
@@ -381,9 +372,9 @@ func (g *Genesis) ToBlock() (*types.Block, *state.IntraBlockState, error) {
 	go func() { // we may run inside write tx, can't open 2nd write tx in same goroutine
 		// TODO(yperbasis): use memdb.MemoryMutation instead
 		defer wg.Done()
-		genesisDBLock.Lock()
-		defer genesisDBLock.Unlock()
-		tx, err := genesisTmpDB.BeginRw(context.Background())
+		tmpDB := mdbx.NewMDBX(log.New()).InMem("").MapSize(2 * datasize.GB).MustOpen()
+		defer tmpDB.Close()
+		tx, err := tmpDB.BeginRw(context.Background())
 		if err != nil {
 			panic(err)
 		}
diff --git a/params/version.go b/params/version.go
index 1d8af4232..c346a8c0a 100644
--- a/params/version.go
+++ b/params/version.go
@@ -31,10 +31,10 @@ var (
 
 // see https://calver.org
 const (
-	VersionMajor       = 2     // Major version component of the current release
-	VersionMinor       = 34    // Minor version component of the current release
-	VersionMicro       = 0     // Patch version component of the current release
-	VersionModifier    = "dev" // Modifier component of the current release
+	VersionMajor       = 2        // Major version component of the current release
+	VersionMinor       = 34       // Minor version component of the current release
+	VersionMicro       = 0        // Patch version component of the current release
+	VersionModifier    = "stable" // Modifier component of the current release
 	VersionKeyCreated  = "ErigonVersionCreated"
 	VersionKeyFinished = "ErigonVersionFinished"
 )