diff --git a/ethereumj-core/src/main/java/org/ethereum/net/eth/EthHandler.java b/ethereumj-core/src/main/java/org/ethereum/net/eth/EthHandler.java
index bf6719b3..680002fc 100644
--- a/ethereumj-core/src/main/java/org/ethereum/net/eth/EthHandler.java
+++ b/ethereumj-core/src/main/java/org/ethereum/net/eth/EthHandler.java
@@ -43,7 +43,7 @@ import static org.ethereum.net.message.StaticMessages.GET_TRANSACTIONS_MESSAGE;
 @Scope("prototype")
 public class EthHandler extends SimpleChannelInboundHandler<EthMessage> {
 
-    public final static byte VERSION = 48;
+    public final static byte VERSION = 49;
     public final static byte NETWORK_ID = 0x0;
 
     private final static Logger logger = LoggerFactory.getLogger("net");
diff --git a/ethereumj-core/src/main/java/org/ethereum/vm/GasCost.java b/ethereumj-core/src/main/java/org/ethereum/vm/GasCost.java
index 95ad26aa..1ada0196 100644
--- a/ethereumj-core/src/main/java/org/ethereum/vm/GasCost.java
+++ b/ethereumj-core/src/main/java/org/ethereum/vm/GasCost.java
@@ -12,8 +12,8 @@ public class GasCost {
 	public static int STEP = 1;
     /** Cost 20 gas */
     public static int BALANCE = 20;
-    /** Cost 20 gas */
-    public static int SHA3 = 20;
+    /** Cost 10 gas */
+    public static int SHA3 = 10;
     /** Cost 20 gas */
     public static int SLOAD = 20;
 	/** Cost 0 gas */
diff --git a/ethereumj-core/src/main/java/org/ethereum/vm/VM.java b/ethereumj-core/src/main/java/org/ethereum/vm/VM.java
index 473e47bc..11a4a4a9 100644
--- a/ethereumj-core/src/main/java/org/ethereum/vm/VM.java
+++ b/ethereumj-core/src/main/java/org/ethereum/vm/VM.java
@@ -135,6 +135,13 @@ public class VM {
         		case SHA3:
         			gasCost = GasCost.SHA3;
         			newMemSize = memNeeded(stack.peek(), stack.get(stack.size()-2));
+
+                    DataWord size = stack.get(stack.size()-2);
+                    long chunkUsed = (size.longValue() + 31) / 32;
+                    gasCost += chunkUsed * GasCost.SHA3;
+
+                    //todo: calc how much bytes for sha3(): sha3 / 32 * 10
+
         			break;
         		case CALLDATACOPY:
                     copySize = stack.get(stack.size()-3).longValue();