diff --git a/lib/fastvm-93a258f.jar b/lib/fastvm-39cde69.jar
similarity index 84%
rename from lib/fastvm-93a258f.jar
rename to lib/fastvm-39cde69.jar
index 4e32552ea1..e1b9a15036 100644
Binary files a/lib/fastvm-93a258f.jar and b/lib/fastvm-39cde69.jar differ
diff --git a/modAionImpl/build.gradle b/modAionImpl/build.gradle
index 14bbb48bd7..62bfbf75ae 100644
--- a/modAionImpl/build.gradle
+++ b/modAionImpl/build.gradle
@@ -24,7 +24,7 @@ dependencies {
     compile project(':modEvtMgrImpl')
     compile project(':modPrecompiled')
     compile project(':modTxPool')
-    compile files("${rootProject.projectDir}/lib/fastvm-93a258f.jar")
+    compile files("${rootProject.projectDir}/lib/fastvm-39cde69.jar")
     compile 'org.json:json:20180813'
     compile 'info.picocli:picocli:4.0.0'
     compile files("${rootProject.projectDir}/lib/aion-types-22a3be9.jar")
diff --git a/modAionImpl/src/org/aion/zero/impl/valid/TXValidator.java b/modAionImpl/src/org/aion/zero/impl/valid/TXValidator.java
index cfc62425cb..75ee9a269c 100644
--- a/modAionImpl/src/org/aion/zero/impl/valid/TXValidator.java
+++ b/modAionImpl/src/org/aion/zero/impl/valid/TXValidator.java
@@ -3,6 +3,7 @@
 import static org.aion.zero.impl.vm.common.TxNrgRule.isValidNrgContractCreate;
 import static org.aion.zero.impl.vm.common.TxNrgRule.isValidNrgContractCreateAfterUnity;
 import static org.aion.zero.impl.vm.common.TxNrgRule.isValidNrgTx;
+import static org.aion.zero.impl.vm.common.TxNrgRule.isValidNrgTxAfterUnity;
 
 import java.util.Collections;
 import java.util.Map;
@@ -64,12 +65,12 @@ private static boolean isValid0(AionTransaction tx) {
     private static boolean isValidAfterUnity(AionTransaction tx) {
         long nrg = tx.getEnergyLimit();
         if (tx.isContractCreationTransaction()) {
-            if (!isValidNrgContractCreateAfterUnity(nrg)) {
+            if (!isValidNrgContractCreateAfterUnity(nrg, tx.getData())) {
                 LOG.error("invalid contract create nrg!");
                 return false;
             }
         } else {
-            if (!isValidNrgTx(nrg)) {
+            if (!isValidNrgTxAfterUnity(nrg, tx.getData())) {
                 LOG.error("invalid tx nrg!");
                 return false;
             }
diff --git a/modAionImpl/src/org/aion/zero/impl/vm/avm/AvmConfigurations.java b/modAionImpl/src/org/aion/zero/impl/vm/avm/AvmConfigurations.java
index 07d3b236c7..c4c1d82dae 100644
--- a/modAionImpl/src/org/aion/zero/impl/vm/avm/AvmConfigurations.java
+++ b/modAionImpl/src/org/aion/zero/impl/vm/avm/AvmConfigurations.java
@@ -13,11 +13,12 @@ public final class AvmConfigurations {
     private static AvmVersionSchedule multiVersionSchedule = null;
     private static String projectRootDir = null;
     private static IEnergyRules energyRules = (t, l) -> (t == IEnergyRules.TransactionType.CREATE) ? TxNrgRule.isValidNrgContractCreate(l) : TxNrgRule.isValidNrgTx(l);
+    // The AVM does check the energy requirement regarding the transaction data context. Therefor We only check the basic rule in here.
     private static IEnergyRules energyRulesAfterUnityFork =
             (t, l) ->
                     (t == IEnergyRules.TransactionType.CREATE)
-                            ? TxNrgRule.isValidNrgContractCreateAfterUnity(l)
-                            : TxNrgRule.isValidNrgTx(l);
+                            ? TxNrgRule.isValidNrgContractCreateAfterUnity(l, null)
+                            : TxNrgRule.isValidNrgTxAfterUnity(l, null);
 
     private AvmConfigurations() {}
 
diff --git a/modAionImpl/src/org/aion/zero/impl/vm/common/TransactionUtil.java b/modAionImpl/src/org/aion/zero/impl/vm/common/TransactionUtil.java
new file mode 100644
index 0000000000..10be338c8d
--- /dev/null
+++ b/modAionImpl/src/org/aion/zero/impl/vm/common/TransactionUtil.java
@@ -0,0 +1,35 @@
+package org.aion.zero.impl.vm.common;
+
+import org.aion.fastvm.FvmConstants;
+
+/** Duplicate from the fastVM module. */
+public final class TransactionUtil {
+
+    public static long computeTransactionCost(boolean isCreate, byte[] data) {
+        long nonZeroes = nonZeroBytesInData(data);
+        long zeroes = zeroBytesInData(data);
+
+        return (isCreate ? FvmConstants.CREATE_TRANSACTION_FEE : 0)
+                + FvmConstants.TRANSACTION_BASE_FEE
+                + zeroes * FvmConstants.ZERO_BYTE_FEE
+                + nonZeroes * FvmConstants.NONZERO_BYTE_FEE;
+    }
+
+    private static long nonZeroBytesInData(byte[] data) {
+        int total = (data == null) ? 0 : data.length;
+
+        return total - zeroBytesInData(data);
+    }
+
+    private static long zeroBytesInData(byte[] data) {
+        if (data == null) {
+            return 0;
+        }
+
+        int c = 0;
+        for (byte b : data) {
+            c += (b == 0) ? 1 : 0;
+        }
+        return c;
+    }
+}
diff --git a/modAionImpl/src/org/aion/zero/impl/vm/common/TxNrgRule.java b/modAionImpl/src/org/aion/zero/impl/vm/common/TxNrgRule.java
index d23b8b94e3..4e1a1a3e55 100644
--- a/modAionImpl/src/org/aion/zero/impl/vm/common/TxNrgRule.java
+++ b/modAionImpl/src/org/aion/zero/impl/vm/common/TxNrgRule.java
@@ -16,8 +16,8 @@ public static boolean isValidNrgContractCreate(long energyLimit) {
         return (energyLimit >= CONTRACT_CREATE_TX_NRG_MIN) && (energyLimit <= CONTRACT_CREATE_TX_NRG_MAX);
     }
 
-    public static boolean isValidNrgContractCreateAfterUnity(long energyLimit) {
-        return (energyLimit >= (CONTRACT_CREATE_TX_NRG_MIN + TX_NRG_MIN))
+    public static boolean isValidNrgContractCreateAfterUnity(long energyLimit, byte[] data) {
+        return (energyLimit >= TransactionUtil.computeTransactionCost(true, data))
                 && (energyLimit <= CONTRACT_CREATE_TX_NRG_MAX);
     }
 
@@ -25,6 +25,11 @@ public static boolean isValidNrgTx(long energyLimit) {
         return (energyLimit >= TX_NRG_MIN) && (energyLimit <= TX_NRG_MAX);
     }
 
+    public static boolean isValidNrgTxAfterUnity(long energyLimit, byte[] data) {
+        return (energyLimit >= TransactionUtil.computeTransactionCost(false, data))
+                && (energyLimit <= TX_NRG_MAX);
+    }
+
     public static boolean isValidTxNrgPrice(long energyPrice) {
         return (energyPrice >= NRGPRICE_MIN) && (energyPrice <= NRGPRICE_MAX);
     }
diff --git a/modAionImpl/src/org/aion/zero/impl/vm/fvm/ExternalStateForFvm.java b/modAionImpl/src/org/aion/zero/impl/vm/fvm/ExternalStateForFvm.java
index 89eea53afe..9161b06475 100644
--- a/modAionImpl/src/org/aion/zero/impl/vm/fvm/ExternalStateForFvm.java
+++ b/modAionImpl/src/org/aion/zero/impl/vm/fvm/ExternalStateForFvm.java
@@ -312,9 +312,9 @@ public void incrementNonce(AionAddress address) {
      * @return whether the energy limit is valid.
      */
     @Override
-    public boolean isValidEnergyLimitForCreate(long energyLimit) {
+    public boolean isValidEnergyLimitForCreate(long energyLimit, byte[] data) {
         return (this.isLocalCall) || ((this.isUnityForkEnabled)
-            ? TxNrgRule.isValidNrgContractCreateAfterUnity(energyLimit)
+            ? TxNrgRule.isValidNrgContractCreateAfterUnity(energyLimit, data)
             : TxNrgRule.isValidNrgContractCreate(energyLimit));
     }
 
@@ -329,8 +329,16 @@ public boolean isValidEnergyLimitForCreate(long energyLimit) {
      * @return whether the energy limit is valid.
      */
     @Override
-    public boolean isValidEnergyLimitForNonCreate(long energyLimit) {
-        return (this.isLocalCall) ? true : TxNrgRule.isValidNrgTx(energyLimit);
+    public boolean isValidEnergyLimitForNonCreate(long energyLimit, byte[] data) {
+        if (this.isLocalCall) {
+            return true;
+        } else {
+            if (this.isUnityForkEnabled) {
+                return TxNrgRule.isValidNrgTxAfterUnity(energyLimit, data);
+            } else {
+                return TxNrgRule.isValidNrgTx(energyLimit);
+            }
+        }
     }
 
     /**
diff --git a/modBase/build.gradle b/modBase/build.gradle
index 777b363b7e..ecd48037dd 100644
--- a/modBase/build.gradle
+++ b/modBase/build.gradle
@@ -4,7 +4,7 @@ test.dependsOn copyNativeLibsForModuleTests
 clean.dependsOn deleteNativeLibs
 
 dependencies {
-    compile files("${rootProject.projectDir}/lib/fastvm-93a258f.jar")
+    compile files("${rootProject.projectDir}/lib/fastvm-39cde69.jar")
     compile files("${rootProject.projectDir}/lib/aion-types-22a3be9.jar")
     compile project(':modUtil')
     compile project(':modLogger')