diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 2e149415e0..3d34cb6597 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -47,6 +47,7 @@ object Dependencies {
   val boopickle = Seq("io.suzaku" %% "boopickle" % "1.3.3")
 
   val rocksDb = Seq(
+    // use "5.18.3" for older macOS
     "org.rocksdb" % "rocksdbjni" % "6.11.4"
   )
 
diff --git a/src/main/protobuf/extvm b/src/main/protobuf/extvm
index 53eb31f3c5..6b3039be92 160000
--- a/src/main/protobuf/extvm
+++ b/src/main/protobuf/extvm
@@ -1 +1 @@
-Subproject commit 53eb31f3c59f7200994915b834e626bd292df7ed
+Subproject commit 6b3039be92882df6ef6c15887c8d0b5f10c86d6f
diff --git a/src/main/scala/io/iohk/ethereum/consensus/ethash/RestrictedEthashSigner.scala b/src/main/scala/io/iohk/ethereum/consensus/ethash/RestrictedEthashSigner.scala
index 03a53664ad..f27cc3f058 100644
--- a/src/main/scala/io/iohk/ethereum/consensus/ethash/RestrictedEthashSigner.scala
+++ b/src/main/scala/io/iohk/ethereum/consensus/ethash/RestrictedEthashSigner.scala
@@ -11,23 +11,26 @@ object RestrictedEthashSigner {
 
   def validateSignature(blockHeader: BlockHeader, allowedMiners: Set[ByteString]): Boolean = {
     val signature = blockHeader.extraData.takeRight(ECDSASignature.EncodedLength)
-    val blockHeaderWithoutSig = blockHeader.dropRightNExtraDataBytes(ECDSASignature.EncodedLength)
-    val encodedBlockHeader = getEncodedWithoutNonce(blockHeaderWithoutSig)
-    val headerHash = crypto.kec256(encodedBlockHeader)
-    val maybePubKey = for {
-      sig <- ECDSASignature.fromBytes(signature)
-      pubKeyBytes <- sig.publicKey(headerHash)
-    } yield ByteString.fromArrayUnsafe(pubKeyBytes)
+    val headerHash = hashHeaderForSigning(blockHeader)
+    val maybePubKey = ECDSASignature.fromBytes(signature).flatMap(_.publicKey(headerHash))
 
     maybePubKey.exists(allowedMiners.contains)
   }
 
   def signHeader(blockHeader: BlockHeader, keyPair: AsymmetricCipherKeyPair): BlockHeader = {
-    val encoded = getEncodedWithoutNonce(blockHeader)
-    val hash = crypto.kec256(encoded)
-    val signed = ECDSASignature.sign(hash, keyPair)
+    val hash = hashHeaderForSigning(blockHeader)
+    val signed = ECDSASignature.sign(hash.toArray, keyPair)
     val sigBytes = signed.toBytes
     blockHeader.withAdditionalExtraData(sigBytes)
   }
 
+  def hashHeaderForSigning(blockHeader: BlockHeader): ByteString = {
+    val blockHeaderWithoutSig =
+      if (blockHeader.extraData.length >= ECDSASignature.EncodedLength)
+        blockHeader.dropRightNExtraDataBytes(ECDSASignature.EncodedLength)
+      else blockHeader
+    val encodedBlockHeader = getEncodedWithoutNonce(blockHeaderWithoutSig)
+    ByteString(crypto.kec256(encodedBlockHeader))
+  }
+
 }
diff --git a/src/main/scala/io/iohk/ethereum/extvm/VMServer.scala b/src/main/scala/io/iohk/ethereum/extvm/VMServer.scala
index ba181d3b84..6d00a300f4 100644
--- a/src/main/scala/io/iohk/ethereum/extvm/VMServer.scala
+++ b/src/main/scala/io/iohk/ethereum/extvm/VMServer.scala
@@ -70,8 +70,11 @@ class VMServer(messageHandler: MessageHandler) extends Logger {
 
   private def awaitHello(): Unit = {
     val helloMsg = messageHandler.awaitMessage[msg.Hello]
-    require(helloMsg.version == ApiVersionProvider.version)
-    require(helloMsg.config.isEthereumConfig)
+    require(
+      helloMsg.version == ApiVersionProvider.version,
+      s"Wrong Hello message version. Expected ${ApiVersionProvider.version} but was ${helloMsg.version}"
+    )
+    require(helloMsg.config.isEthereumConfig, "Hello message ethereum config must be true")
     defaultBlockchainConfig = constructBlockchainConfig(helloMsg.config.ethereumConfig.get)
   }
 
diff --git a/src/main/scala/io/iohk/ethereum/jsonrpc/BlockResponse.scala b/src/main/scala/io/iohk/ethereum/jsonrpc/BlockResponse.scala
index c646968ec5..c0839e7bd4 100644
--- a/src/main/scala/io/iohk/ethereum/jsonrpc/BlockResponse.scala
+++ b/src/main/scala/io/iohk/ethereum/jsonrpc/BlockResponse.scala
@@ -2,11 +2,14 @@ package io.iohk.ethereum.jsonrpc
 
 import akka.util.ByteString
 import cats.implicits._
+import io.iohk.ethereum.consensus.ethash.RestrictedEthashSigner
 import io.iohk.ethereum.crypto.ECDSASignature
 import io.iohk.ethereum.domain.{Block, BlockBody, BlockHeader, ChainWeight}
+import io.iohk.ethereum.utils.ByteStringUtils
 
 case class CheckpointResponse(signatures: Seq[ECDSASignature], signers: Seq[ByteString])
 
+//scalastyle:off method.length
 case class BlockResponse(
     number: BigInt,
     hash: Option[ByteString],
@@ -29,7 +32,9 @@ case class BlockResponse(
     checkpoint: Option[CheckpointResponse],
     treasuryOptOut: Option[Boolean],
     transactions: Either[Seq[ByteString], Seq[TransactionResponse]],
-    uncles: Seq[ByteString]
+    uncles: Seq[ByteString],
+    signature: String,
+    signer: String
 ) {
   val chainWeight: Option[ChainWeight] = for {
     lcn <- lastCheckpointNumber
@@ -39,6 +44,8 @@ case class BlockResponse(
 
 object BlockResponse {
 
+  val NotAvailable = "N/A"
+
   def apply(
       block: Block,
       weight: Option[ChainWeight] = None,
@@ -61,6 +68,17 @@ object BlockResponse {
 
     val (lcn, td) = weight.map(_.asTuple).separate
 
+    val signature =
+      if (block.header.extraData.length >= ECDSASignature.EncodedLength)
+        ECDSASignature.fromBytes(block.header.extraData.takeRight(ECDSASignature.EncodedLength))
+      else None
+
+    val signatureStr = signature.map(_.toBytes).map(ByteStringUtils.hash2string).getOrElse(NotAvailable)
+    val signerStr = signature
+      .flatMap(_.publicKey(RestrictedEthashSigner.hashHeaderForSigning(block.header)))
+      .map(ByteStringUtils.hash2string)
+      .getOrElse(NotAvailable)
+
     BlockResponse(
       number = block.header.number,
       hash = if (pendingBlock) None else Some(block.header.hash),
@@ -83,7 +101,9 @@ object BlockResponse {
       checkpoint = checkpoint,
       treasuryOptOut = block.header.treasuryOptOut,
       transactions = transactions,
-      uncles = block.body.uncleNodesList.map(_.hash)
+      uncles = block.body.uncleNodesList.map(_.hash),
+      signature = signatureStr,
+      signer = signerStr
     )
   }
 
diff --git a/src/test/scala/io/iohk/ethereum/extvm/VMServerSpec.scala b/src/test/scala/io/iohk/ethereum/extvm/VMServerSpec.scala
index 9ee50e0dfd..fbbf3db535 100644
--- a/src/test/scala/io/iohk/ethereum/extvm/VMServerSpec.scala
+++ b/src/test/scala/io/iohk/ethereum/extvm/VMServerSpec.scala
@@ -110,7 +110,7 @@ class VMServerSpec extends AnyFlatSpec with Matchers with MockFactory {
       accountStartNonce = blockchainConfig.accountStartNonce
     )
     val ethereumConfigMsg = msg.Hello.Config.EthereumConfig(ethereumConfig)
-    val helloMsg = msg.Hello(version = "1.1", config = ethereumConfigMsg)
+    val helloMsg = msg.Hello(version = "2.0", config = ethereumConfigMsg)
 
     val messageHandler = mock[MessageHandler]
     val vmServer = new VMServer(messageHandler)