diff --git a/src/main/scala/com/wavesplatform/network/HandshakeHandler.scala b/src/main/scala/com/wavesplatform/network/HandshakeHandler.scala
index e23ea525f03..bdf3dbce8b8 100644
--- a/src/main/scala/com/wavesplatform/network/HandshakeHandler.scala
+++ b/src/main/scala/com/wavesplatform/network/HandshakeHandler.scala
@@ -121,7 +121,7 @@ object HandshakeHandler extends ScorexLogging {
   val NodeNameAttributeKey = AttributeKey.newInstance[String]("name")
 
   def versionIsSupported(remoteVersion: (Int, Int, Int)): Boolean =
-    remoteVersion._1 == 0 && remoteVersion._2 >= 7
+    remoteVersion._1 == 0 && remoteVersion._2 >= 8
 
   def removeHandshakeHandlers(ctx: ChannelHandlerContext, thisHandler: ChannelHandler): Unit = {
     ctx.pipeline().remove(classOf[HandshakeTimeoutHandler])
diff --git a/src/main/scala/com/wavesplatform/state2/appender/package.scala b/src/main/scala/com/wavesplatform/state2/appender/package.scala
index 3dd2dbd9187..152a23cbf46 100644
--- a/src/main/scala/com/wavesplatform/state2/appender/package.scala
+++ b/src/main/scala/com/wavesplatform/state2/appender/package.scala
@@ -23,6 +23,11 @@ package object appender extends ScorexLogging {
 
   private val MaxTimeDrift: Long = 100 // millis
 
+  private val correctBlockId1 = ByteStr.decodeBase58("2GNCYVy7k3kEPXzz12saMtRDeXFKr8cymVsG8Yxx3sZZ75eHj9csfXnGHuuJe7XawbcwjKdifUrV1uMq4ZNCWPf1").get
+  private val correctBlockId2 = ByteStr.decodeBase58("5uZoDnRKeWZV9Thu2nvJVZ5dBvPB7k2gvpzFD618FMXCbBVBMN2rRyvKBZBhAGnGdgeh2LXEeSr9bJqruJxngsE7").get
+  private val height1 = 812608
+  private val height2 = 813207
+
   private[appender] val scheduler = monix.execution.Scheduler.singleThread("appender")
 
   private[appender] def processAndBlacklistOnFailure[A, B](ch: Channel, peerDatabase: PeerDatabase, miner: Miner, allChannels: ChannelGroup,
@@ -96,7 +101,8 @@ package object appender extends ScorexLogging {
       effectiveBalance <- genBalance(height).left.map(GenericError(_))
       hit = calcHit(prevBlockData, generator)
       target = calcTarget(parent.timestamp, parent.consensusData.baseTarget, blockTime, effectiveBalance)
-      _ <- Either.cond(hit < target, (), GenericError(s"calculated hit $hit >= calculated target $target"))
+      _ <- Either.cond(hit < target || (height == height1 && block.uniqueId == correctBlockId1) || (height == height2 && block.uniqueId == correctBlockId2),
+        (), GenericError(s"calculated hit $hit >= calculated target $target"))
     } yield ()
 
     r.left.map {