diff --git a/build.gradle b/build.gradle
index 344a79bc..710f3796 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ subprojects {
     apply plugin: 'java'
 
     group = 'org.ethereum'
-    version = '0.8.3-SNAPSHOT'
+    version = '0.8.4-SNAPSHOT'
 
     compileJava.options.encoding = 'UTF-8'
     compileJava.options.compilerArgs << '-XDignore.symbol.file'
diff --git a/ethereumj-core/src/main/java/org/ethereum/core/BlockchainImpl.java b/ethereumj-core/src/main/java/org/ethereum/core/BlockchainImpl.java
index e8d1466f..61d704bc 100644
--- a/ethereumj-core/src/main/java/org/ethereum/core/BlockchainImpl.java
+++ b/ethereumj-core/src/main/java/org/ethereum/core/BlockchainImpl.java
@@ -341,7 +341,7 @@ public class BlockchainImpl implements Blockchain {
 
             TransactionExecutor executor = new TransactionExecutor(tx, block.getCoinbase(),
                     track, blockStore,
-                    programInvokeFactory, block);
+                    programInvokeFactory, block, listener);
             executor.execute();
 
             TransactionReceipt receipt = executor.getReceipt();
diff --git a/ethereumj-core/src/main/java/org/ethereum/core/TransactionExecutor.java b/ethereumj-core/src/main/java/org/ethereum/core/TransactionExecutor.java
index d851b740..f3f50ba0 100644
--- a/ethereumj-core/src/main/java/org/ethereum/core/TransactionExecutor.java
+++ b/ethereumj-core/src/main/java/org/ethereum/core/TransactionExecutor.java
@@ -2,6 +2,7 @@ package org.ethereum.core;
 
 import org.ethereum.db.BlockStore;
 import org.ethereum.facade.Repository;
+import org.ethereum.listener.EthereumListener;
 import org.ethereum.vm.DataWord;
 import org.ethereum.vm.GasCost;
 import org.ethereum.vm.LogInfo;
@@ -45,9 +46,10 @@ public class TransactionExecutor {
     private ProgramResult result;
     private Block currentBlock;
 
+    private final EthereumListener listener;
 
     public TransactionExecutor(Transaction tx, byte[] coinbase, Repository track, BlockStore blockStore,
-                               ProgramInvokeFactory programInvokeFactory, Block currentBlock) {
+                               ProgramInvokeFactory programInvokeFactory, Block currentBlock, EthereumListener listener) {
 
         this.tx = tx;
         this.coinbase = coinbase;
@@ -55,6 +57,7 @@ public class TransactionExecutor {
         this.blockStore = blockStore;
         this.programInvokeFactory = programInvokeFactory;
         this.currentBlock = currentBlock;
+        this.listener = listener;
     }
 
 /* jeff:
@@ -69,7 +72,8 @@ public class TransactionExecutor {
     public void execute() {
 
 
-        logger.info("applyTransaction: [{}]", Hex.toHexString(tx.getHash()));
+        final String txHash = Hex.toHexString(tx.getHash());
+        logger.info("applyTransaction: [{}]", txHash);
 
         TransactionReceipt receipt = new TransactionReceipt();
 
@@ -94,8 +98,7 @@ public class TransactionExecutor {
         //Insert gas cost protection
         BigInteger gasLimit = new BigInteger(1, tx.getGasLimit());
         if (gasLimit.compareTo(BigInteger.ZERO) == 0) {
-            logger.debug("No gas limit set on transaction: hash={}",
-                    Hex.toHexString(tx.getHash()));
+            logger.debug("No gas limit set on transaction: hash={}", txHash);
 
             receipt.setCumulativeGas(0);
             this.receipt = receipt;
@@ -212,7 +215,9 @@ public class TransactionExecutor {
                 if (CONFIG.playVM())
                     vm.play(program);
 
-                program.saveProgramTraceToFile(Hex.toHexString(tx.getHash()));
+                listener.onVMTraceCreated(txHash, program.getProgramTrace().getJsonString());
+                program.saveProgramTraceToFile(txHash);
+                
                 result = program.getResult();
                 applyProgramResult(result, gasDebit, gasPrice, trackTx,
                         senderAddress, receiverAddress, coinbase, isContractCreation);
diff --git a/ethereumj-core/src/main/java/org/ethereum/jsontestsuite/TestRunner.java b/ethereumj-core/src/main/java/org/ethereum/jsontestsuite/TestRunner.java
index edeaf433..42b121a2 100644
--- a/ethereumj-core/src/main/java/org/ethereum/jsontestsuite/TestRunner.java
+++ b/ethereumj-core/src/main/java/org/ethereum/jsontestsuite/TestRunner.java
@@ -5,6 +5,7 @@ import org.ethereum.core.Block;
 import org.ethereum.core.TransactionExecutor;
 import org.ethereum.db.*;
 import org.ethereum.facade.Repository;
+import org.ethereum.listener.EthereumListenerAdapter;
 import org.ethereum.util.ByteUtil;
 import org.ethereum.vm.DataWord;
 import org.ethereum.vm.LogInfo;
@@ -104,7 +105,7 @@ public class TestRunner {
         Repository track = repository.startTracking();
         TransactionExecutor executor =
                 new TransactionExecutor(tx, coinbase, track, new BlockStoreDummy(),
-                        invokeFactory, blockchain.getBestBlock());
+                        invokeFactory, blockchain.getBestBlock(), new EthereumListenerAdapter());
         executor.execute();
         track.commit();
 
diff --git a/ethereumj-core/src/main/java/org/ethereum/listener/CompositeEthereumListener.java b/ethereumj-core/src/main/java/org/ethereum/listener/CompositeEthereumListener.java
index da61af71..91fa73b6 100644
--- a/ethereumj-core/src/main/java/org/ethereum/listener/CompositeEthereumListener.java
+++ b/ethereumj-core/src/main/java/org/ethereum/listener/CompositeEthereumListener.java
@@ -83,9 +83,15 @@ public class CompositeEthereumListener implements EthereumListener {
             listener.onHandShakePeer(helloMessage);
     }
 
+    @Override
+    public void onVMTraceCreated(String transactionHash, String traceAsJson) {
+        for (EthereumListener listener : listeners) {
+            listener.onVMTraceCreated(transactionHash, traceAsJson);
+        }
+    }
+
     public void addListener(EthereumListener listener) {
         listeners.add(listener);
     }
 
-
 }
diff --git a/ethereumj-core/src/main/java/org/ethereum/listener/EthereumListener.java b/ethereumj-core/src/main/java/org/ethereum/listener/EthereumListener.java
index c39f78b4..55c50a58 100644
--- a/ethereumj-core/src/main/java/org/ethereum/listener/EthereumListener.java
+++ b/ethereumj-core/src/main/java/org/ethereum/listener/EthereumListener.java
@@ -15,24 +15,25 @@ import java.util.Set;
  */
 public interface EthereumListener {
 
-    public void trace(String output);
+    void trace(String output);
 
-    public void onBlock(Block block);
+    void onBlock(Block block);
 
-    public void onBlockReciepts(List<TransactionReceipt> receipts);
+    void onBlockReciepts(List<TransactionReceipt> receipts);
 
-    public void onRecvMessage(Message message);
+    void onRecvMessage(Message message);
 
-    public void onSendMessage(Message message);
+    void onSendMessage(Message message);
 
-    public void onPeerDisconnect(String host, long port);
+    void onPeerDisconnect(String host, long port);
 
-    public void onPendingTransactionsReceived(Set<Transaction> transactions);
+    void onPendingTransactionsReceived(Set<Transaction> transactions);
 
-    public void onSyncDone();
+    void onSyncDone();
 
-    public void onNoConnections();
+    void onNoConnections();
 
-    public void onHandShakePeer(HelloMessage helloMessage);
+    void onHandShakePeer(HelloMessage helloMessage);
 
+    void onVMTraceCreated(String transactionHash, String traceAsJson);
 }
diff --git a/ethereumj-core/src/main/java/org/ethereum/listener/EthereumListenerAdapter.java b/ethereumj-core/src/main/java/org/ethereum/listener/EthereumListenerAdapter.java
index 91329722..87c6d5be 100644
--- a/ethereumj-core/src/main/java/org/ethereum/listener/EthereumListenerAdapter.java
+++ b/ethereumj-core/src/main/java/org/ethereum/listener/EthereumListenerAdapter.java
@@ -58,4 +58,9 @@ public class EthereumListenerAdapter implements EthereumListener {
     public void onBlockReciepts(List<TransactionReceipt> receipts) {
 
     }
+
+    @Override
+    public void onVMTraceCreated(String transactionHash, String traceAsJson) {
+
+    }
 }