diff --git a/beaconchain/libs/beaconchain.go b/beaconchain/libs/beaconchain.go
index 8e61663cc..780482dc4 100644
--- a/beaconchain/libs/beaconchain.go
+++ b/beaconchain/libs/beaconchain.go
@@ -1,20 +1,21 @@
 package beaconchain
 
 import (
-	"github.com/harmony-one/harmony/beaconchain/rpc"
 	"math/rand"
 	"strconv"
 	"sync"
 
 	"github.com/dedis/kyber"
+
+	"github.com/harmony-one/harmony/beaconchain/rpc"
 	"github.com/harmony-one/harmony/crypto/pki"
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/log"
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/host"
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
 	"github.com/harmony-one/harmony/proto/bcconn"
 	proto_identity "github.com/harmony-one/harmony/proto/identity"
-	"github.com/harmony-one/harmony/utils"
 )
 
 var mutex sync.Mutex
diff --git a/client/txgen/main.go b/client/txgen/main.go
index 9b97e022c..e34b34c59 100644
--- a/client/txgen/main.go
+++ b/client/txgen/main.go
@@ -13,13 +13,13 @@ import (
 	"github.com/harmony-one/harmony/client/txgen/txgen"
 	"github.com/harmony-one/harmony/consensus"
 	"github.com/harmony-one/harmony/core/types"
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/log"
 	"github.com/harmony-one/harmony/newnode"
 	"github.com/harmony-one/harmony/node"
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
 	proto_node "github.com/harmony-one/harmony/proto/node"
-	"github.com/harmony-one/harmony/utils"
 )
 
 var (
diff --git a/consensus/consensus.go b/consensus/consensus.go
index 6b1e29973..88a8425e3 100644
--- a/consensus/consensus.go
+++ b/consensus/consensus.go
@@ -17,10 +17,10 @@ import (
 	"github.com/harmony-one/harmony/core/types"
 	"github.com/harmony-one/harmony/crypto"
 	"github.com/harmony-one/harmony/crypto/pki"
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/log"
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/host"
-	"github.com/harmony-one/harmony/utils"
 
 	proto_node "github.com/harmony-one/harmony/proto/node"
 )
diff --git a/consensus/consensus_test.go b/consensus/consensus_test.go
index 6c25d7427..f75c892da 100644
--- a/consensus/consensus_test.go
+++ b/consensus/consensus_test.go
@@ -3,9 +3,9 @@ package consensus
 import (
 	"testing"
 
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
-	"github.com/harmony-one/harmony/utils"
 )
 
 func TestNew(test *testing.T) {
diff --git a/consensus/consensus_validator.go b/consensus/consensus_validator.go
index ef1884033..d72acd586 100644
--- a/consensus/consensus_validator.go
+++ b/consensus/consensus_validator.go
@@ -9,8 +9,8 @@ import (
 	"github.com/harmony-one/harmony/core/types"
 	"github.com/harmony-one/harmony/crypto"
 	"github.com/harmony-one/harmony/internal/attack"
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/log"
-	"github.com/harmony-one/harmony/utils"
 )
 
 // ProcessMessageValidator dispatches validator's consensus message.
diff --git a/core/blockchain.go b/core/blockchain.go
index 04adef182..44f7f21c8 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -42,7 +42,7 @@ import (
 	"github.com/harmony-one/harmony/core/types"
 	"github.com/harmony-one/harmony/core/vm"
 	hdb "github.com/harmony-one/harmony/internal/db"
-	"github.com/harmony-one/harmony/trie"
+	"github.com/harmony-one/harmony/internal/trie"
 	"github.com/hashicorp/golang-lru"
 )
 
diff --git a/core/state/database.go b/core/state/database.go
index 2c38a2360..8529163a4 100644
--- a/core/state/database.go
+++ b/core/state/database.go
@@ -22,7 +22,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/harmony-one/harmony/internal/db"
-	"github.com/harmony-one/harmony/trie"
+	"github.com/harmony-one/harmony/internal/trie"
 	lru "github.com/hashicorp/golang-lru"
 )
 
diff --git a/internal/db/memory_db.go b/internal/db/memory_db.go
index 19ed73011..f81e0e797 100644
--- a/internal/db/memory_db.go
+++ b/internal/db/memory_db.go
@@ -4,7 +4,7 @@ import (
 	"errors"
 	"sync"
 
-	"github.com/harmony-one/harmony/utils"
+	"github.com/harmony-one/harmony/internal/utils"
 )
 
 // MemDatabase is the test memory database. It won't be used for any production.
diff --git a/trie/database.go b/internal/trie/database.go
similarity index 100%
rename from trie/database.go
rename to internal/trie/database.go
diff --git a/trie/encoding.go b/internal/trie/encoding.go
similarity index 100%
rename from trie/encoding.go
rename to internal/trie/encoding.go
diff --git a/trie/encoding_test.go b/internal/trie/encoding_test.go
similarity index 100%
rename from trie/encoding_test.go
rename to internal/trie/encoding_test.go
diff --git a/trie/errors.go b/internal/trie/errors.go
similarity index 100%
rename from trie/errors.go
rename to internal/trie/errors.go
diff --git a/trie/hasher.go b/internal/trie/hasher.go
similarity index 100%
rename from trie/hasher.go
rename to internal/trie/hasher.go
diff --git a/trie/iterator.go b/internal/trie/iterator.go
similarity index 100%
rename from trie/iterator.go
rename to internal/trie/iterator.go
diff --git a/trie/iterator_test.go b/internal/trie/iterator_test.go
similarity index 100%
rename from trie/iterator_test.go
rename to internal/trie/iterator_test.go
diff --git a/trie/node.go b/internal/trie/node.go
similarity index 100%
rename from trie/node.go
rename to internal/trie/node.go
diff --git a/trie/node_test.go b/internal/trie/node_test.go
similarity index 100%
rename from trie/node_test.go
rename to internal/trie/node_test.go
diff --git a/trie/proof.go b/internal/trie/proof.go
similarity index 100%
rename from trie/proof.go
rename to internal/trie/proof.go
diff --git a/trie/proof_test.go b/internal/trie/proof_test.go
similarity index 100%
rename from trie/proof_test.go
rename to internal/trie/proof_test.go
diff --git a/trie/secure_trie.go b/internal/trie/secure_trie.go
similarity index 100%
rename from trie/secure_trie.go
rename to internal/trie/secure_trie.go
diff --git a/trie/secure_trie_test.go b/internal/trie/secure_trie_test.go
similarity index 100%
rename from trie/secure_trie_test.go
rename to internal/trie/secure_trie_test.go
diff --git a/trie/sync.go b/internal/trie/sync.go
similarity index 100%
rename from trie/sync.go
rename to internal/trie/sync.go
diff --git a/trie/sync_test.go b/internal/trie/sync_test.go
similarity index 100%
rename from trie/sync_test.go
rename to internal/trie/sync_test.go
diff --git a/trie/trie.go b/internal/trie/trie.go
similarity index 100%
rename from trie/trie.go
rename to internal/trie/trie.go
diff --git a/trie/trie_test.go b/internal/trie/trie_test.go
similarity index 100%
rename from trie/trie_test.go
rename to internal/trie/trie_test.go
diff --git a/utils/bytes.go b/internal/utils/bytes.go
similarity index 100%
rename from utils/bytes.go
rename to internal/utils/bytes.go
diff --git a/utils/bytes_test.go b/internal/utils/bytes_test.go
similarity index 100%
rename from utils/bytes_test.go
rename to internal/utils/bytes_test.go
diff --git a/utils/metrics.go b/internal/utils/metrics.go
similarity index 100%
rename from utils/metrics.go
rename to internal/utils/metrics.go
diff --git a/utils/singleton.go b/internal/utils/singleton.go
similarity index 100%
rename from utils/singleton.go
rename to internal/utils/singleton.go
diff --git a/utils/singleton_test.go b/internal/utils/singleton_test.go
similarity index 100%
rename from utils/singleton_test.go
rename to internal/utils/singleton_test.go
diff --git a/utils/utils.go b/internal/utils/utils.go
similarity index 100%
rename from utils/utils.go
rename to internal/utils/utils.go
diff --git a/utils/utils_test.go b/internal/utils/utils_test.go
similarity index 100%
rename from utils/utils_test.go
rename to internal/utils/utils_test.go
diff --git a/newnode/newnode.go b/newnode/newnode.go
index 6aa086fa2..ea3b9d8cd 100644
--- a/newnode/newnode.go
+++ b/newnode/newnode.go
@@ -6,16 +6,16 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/harmony-one/harmony/p2p/p2pimpl"
-
 	"github.com/dedis/kyber"
+
 	"github.com/harmony-one/harmony/crypto"
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/log"
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/host"
+	"github.com/harmony-one/harmony/p2p/p2pimpl"
 	"github.com/harmony-one/harmony/proto/bcconn"
 	proto_identity "github.com/harmony-one/harmony/proto/identity"
-	"github.com/harmony-one/harmony/utils"
 )
 
 //NewNode is ther struct for a candidate node
diff --git a/node/node_test.go b/node/node_test.go
index cd9b4c8e8..be81039e2 100644
--- a/node/node_test.go
+++ b/node/node_test.go
@@ -9,10 +9,10 @@ import (
 	"github.com/harmony-one/harmony/consensus"
 	"github.com/harmony-one/harmony/crypto"
 	"github.com/harmony-one/harmony/crypto/pki"
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
 	proto_node "github.com/harmony-one/harmony/proto/node"
-	"github.com/harmony-one/harmony/utils"
 )
 
 func TestNewNewNode(t *testing.T) {
diff --git a/proto/bcconn/bcconn_test.go b/proto/bcconn/bcconn_test.go
index ab8aaf70c..d55ce30e5 100644
--- a/proto/bcconn/bcconn_test.go
+++ b/proto/bcconn/bcconn_test.go
@@ -5,8 +5,8 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/p2p"
-	"github.com/harmony-one/harmony/utils"
 )
 
 func TestSerializeDeserializeNodeInfo(t *testing.T) {