diff --git a/README.md b/README.md
index 4468a8d..c46a28f 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Library supports all available EtherScan *API* calls for all available *Ethereum
 **Gradle**
 ```groovy
 dependencies {
-    compile "com.github.goodforgod:java-etherscan-api:1.2.0"
+    compile "com.github.goodforgod:java-etherscan-api:1.2.1"
 }
 ```
 
@@ -24,7 +24,7 @@ dependencies {
 <dependency>
     <groupId>com.github.goodforgod</groupId>
     <artifactId>java-etherscan-api</artifactId>
-    <version>1.2.0</version>
+    <version>1.2.1</version>
 </dependency>
 ```
 
diff --git a/build.gradle b/build.gradle
index f599905..70ed3fa 100644
--- a/build.gradle
+++ b/build.gradle
@@ -38,7 +38,7 @@ dependencies {
     implementation "org.jetbrains:annotations:22.0.0"
     implementation "com.google.code.gson:gson:2.8.9"
 
-    testImplementation "junit:junit:4.13.1"
+    testImplementation "junit:junit:4.13.2"
 }
 
 test {
diff --git a/gradle.properties b/gradle.properties
index 4022082..a6ba485 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,6 @@
 groupId=com.github.goodforgod
 artifactId=java-etherscan-api
-artifactVersion=1.2.0
-buildNumber=1
+artifactVersion=1.2.1
 
 
 ##### GRADLE #####
@@ -9,4 +8,4 @@ org.gradle.daemon=true
 org.gradle.parallel=true
 org.gradle.configureondemand=true
 org.gradle.caching=true
-org.gradle.jvmargs=-Dfile.encoding=UTF-8
+org.gradle.jvmargs=-Dfile.encoding=UTF-8
\ No newline at end of file
diff --git a/src/main/java/io/api/etherscan/core/IProxyApi.java b/src/main/java/io/api/etherscan/core/IProxyApi.java
index e57f6ec..6adcdf0 100644
--- a/src/main/java/io/api/etherscan/core/IProxyApi.java
+++ b/src/main/java/io/api/etherscan/core/IProxyApi.java
@@ -4,6 +4,7 @@
 import io.api.etherscan.model.proxy.BlockProxy;
 import io.api.etherscan.model.proxy.ReceiptProxy;
 import io.api.etherscan.model.proxy.TxProxy;
+import org.jetbrains.annotations.ApiStatus.Experimental;
 import org.jetbrains.annotations.NotNull;
 
 import java.math.BigInteger;
@@ -139,6 +140,7 @@ public interface IProxyApi {
      * @return optional the value at this storage position
      * @throws ApiException parent exception class
      */
+    @Experimental
     @NotNull
     Optional<String> storageAt(String address, long position) throws ApiException;
 
diff --git a/src/main/java/io/api/etherscan/core/impl/BasicProvider.java b/src/main/java/io/api/etherscan/core/impl/BasicProvider.java
index b89447a..b36f406 100644
--- a/src/main/java/io/api/etherscan/core/impl/BasicProvider.java
+++ b/src/main/java/io/api/etherscan/core/impl/BasicProvider.java
@@ -1,6 +1,6 @@
 package io.api.etherscan.core.impl;
 
-import com.google.gson.Gson;
+import com.google.gson.*;
 import io.api.etherscan.error.ApiException;
 import io.api.etherscan.error.EtherScanException;
 import io.api.etherscan.error.ParseException;
@@ -10,6 +10,8 @@
 import io.api.etherscan.model.utility.StringResponseTO;
 import io.api.etherscan.util.BasicUtils;
 
+import java.time.LocalDate;
+import java.time.LocalDateTime;
 import java.util.Map;
 
 /**
@@ -40,7 +42,12 @@ abstract class BasicProvider {
         this.module = "&module=" + module;
         this.baseUrl = baseUrl;
         this.executor = executor;
-        this.gson = new Gson();
+        this.gson = new GsonBuilder()
+                .registerTypeAdapter(LocalDateTime.class, (JsonSerializer<LocalDateTime>) (src, t, c) -> new JsonPrimitive(""))
+                .registerTypeAdapter(LocalDate.class, (JsonSerializer<LocalDate>) (src, t, context) -> new JsonPrimitive(""))
+                .registerTypeAdapter(LocalDateTime.class, (JsonDeserializer<LocalDateTime>) (json, t, c) -> null)
+                .registerTypeAdapter(LocalDate.class, (JsonDeserializer<LocalDate>) (json, t, c) -> null)
+                .create();
     }
 
     <T> T convert(final String json, final Class<T> tClass) {
diff --git a/src/main/java/io/api/etherscan/model/BaseTx.java b/src/main/java/io/api/etherscan/model/BaseTx.java
index a219e57..6eba826 100644
--- a/src/main/java/io/api/etherscan/model/BaseTx.java
+++ b/src/main/java/io/api/etherscan/model/BaseTx.java
@@ -1,5 +1,6 @@
 package io.api.etherscan.model;
 
+import com.google.gson.annotations.Expose;
 import io.api.etherscan.util.BasicUtils;
 
 import java.math.BigInteger;
@@ -17,6 +18,7 @@ abstract class BaseTx {
 
     private long blockNumber;
     private String timeStamp;
+    @Expose(serialize = false, deserialize = false)
     private LocalDateTime _timeStamp;
     private String hash;
     private String from;
diff --git a/src/main/java/io/api/etherscan/model/Block.java b/src/main/java/io/api/etherscan/model/Block.java
index d328841..8853956 100644
--- a/src/main/java/io/api/etherscan/model/Block.java
+++ b/src/main/java/io/api/etherscan/model/Block.java
@@ -1,5 +1,6 @@
 package io.api.etherscan.model;
 
+import com.google.gson.annotations.Expose;
 import io.api.etherscan.util.BasicUtils;
 
 import java.math.BigInteger;
@@ -17,6 +18,7 @@ public class Block {
     private long blockNumber;
     private BigInteger blockReward;
     private String timeStamp;
+    @Expose(serialize = false, deserialize = false)
     private LocalDateTime _timeStamp;
 
     // <editor-fold desc="Getter">
diff --git a/src/main/java/io/api/etherscan/model/Log.java b/src/main/java/io/api/etherscan/model/Log.java
index 36d126b..67ce96f 100644
--- a/src/main/java/io/api/etherscan/model/Log.java
+++ b/src/main/java/io/api/etherscan/model/Log.java
@@ -1,5 +1,6 @@
 package io.api.etherscan.model;
 
+import com.google.gson.annotations.Expose;
 import io.api.etherscan.util.BasicUtils;
 
 import java.math.BigInteger;
@@ -17,20 +18,26 @@
 public class Log {
 
     private String blockNumber;
+    @Expose(serialize = false, deserialize = false)
     private Long _blockNumber;
     private String address;
     private String transactionHash;
     private String transactionIndex;
+    @Expose(serialize = false, deserialize = false)
     private Long _transactionIndex;
     private String timeStamp;
+    @Expose(serialize = false, deserialize = false)
     private LocalDateTime _timeStamp;
     private String data;
     private String gasPrice;
+    @Expose(serialize = false, deserialize = false)
     private BigInteger _gasPrice;
     private String gasUsed;
+    @Expose(serialize = false, deserialize = false)
     private BigInteger _gasUsed;
     private List<String> topics;
     private String logIndex;
+    @Expose(serialize = false, deserialize = false)
     private Long _logIndex;
 
     // <editor-fold desc="Getters">
diff --git a/src/main/java/io/api/etherscan/model/Price.java b/src/main/java/io/api/etherscan/model/Price.java
index d2c6d1c..9bc7dc7 100644
--- a/src/main/java/io/api/etherscan/model/Price.java
+++ b/src/main/java/io/api/etherscan/model/Price.java
@@ -1,5 +1,7 @@
 package io.api.etherscan.model;
 
+import com.google.gson.annotations.Expose;
+
 import java.time.LocalDateTime;
 import java.time.ZoneOffset;
 
@@ -15,7 +17,9 @@ public class Price {
     private double ethbtc;
     private String ethusd_timestamp;
     private String ethbtc_timestamp;
+    @Expose(serialize = false, deserialize = false)
     private LocalDateTime _ethusd_timestamp;
+    @Expose(serialize = false, deserialize = false)
     private LocalDateTime _ethbtc_timestamp;
 
     public double inUsd() {
diff --git a/src/main/java/io/api/etherscan/model/TxInternal.java b/src/main/java/io/api/etherscan/model/TxInternal.java
index 22c5104..5048947 100644
--- a/src/main/java/io/api/etherscan/model/TxInternal.java
+++ b/src/main/java/io/api/etherscan/model/TxInternal.java
@@ -11,7 +11,7 @@
 public class TxInternal extends BaseTx {
 
     private String type;
-    private long traceId;
+    private String traceId;
     private int isError;
     private String errCode;
 
@@ -21,6 +21,10 @@ public String getType() {
     }
 
     public long getTraceId() {
+        return (traceId == null) ? 0 : Long.parseLong(traceId);
+    }
+
+    public String getTraceIdAsString() {
         return traceId;
     }
 
@@ -44,7 +48,7 @@ public boolean equals(Object o) {
 
         TxInternal that = (TxInternal) o;
 
-        if (traceId != that.traceId)
+        if (!Objects.equals(traceId, that.traceId))
             return false;
         return Objects.equals(errCode, that.errCode);
     }
@@ -52,7 +56,7 @@ public boolean equals(Object o) {
     @Override
     public int hashCode() {
         int result = super.hashCode();
-        result = 31 * result + (int) (traceId ^ (traceId >>> 32));
+        result = 31 * result + (traceId != null ? traceId.hashCode() : 0);
         result = 31 * result + (errCode != null ? errCode.hashCode() : 0);
         return result;
     }
diff --git a/src/main/java/io/api/etherscan/model/proxy/BlockProxy.java b/src/main/java/io/api/etherscan/model/proxy/BlockProxy.java
index 3d7ddd3..63821c0 100644
--- a/src/main/java/io/api/etherscan/model/proxy/BlockProxy.java
+++ b/src/main/java/io/api/etherscan/model/proxy/BlockProxy.java
@@ -1,5 +1,6 @@
 package io.api.etherscan.model.proxy;
 
+import com.google.gson.annotations.Expose;
 import io.api.etherscan.util.BasicUtils;
 
 import java.math.BigInteger;
@@ -16,15 +17,18 @@
 public class BlockProxy {
 
     private String number;
+    @Expose(serialize = false, deserialize = false)
     private Long _number;
     private String hash;
     private String parentHash;
     private String stateRoot;
     private String size;
+    @Expose(serialize = false, deserialize = false)
     private Long _size;
     private String difficulty;
     private String totalDifficulty;
     private String timestamp;
+    @Expose(serialize = false, deserialize = false)
     private LocalDateTime _timestamp;
 
     private String miner;
@@ -33,8 +37,10 @@ public class BlockProxy {
     private String logsBloom;
     private String mixHash;
     private String gasUsed;
+    @Expose(serialize = false, deserialize = false)
     private BigInteger _gasUsed;
     private String gasLimit;
+    @Expose(serialize = false, deserialize = false)
     private BigInteger _gasLimit;
 
     private String sha3Uncles;
diff --git a/src/main/java/io/api/etherscan/model/proxy/ReceiptProxy.java b/src/main/java/io/api/etherscan/model/proxy/ReceiptProxy.java
index d69a627..f40cb59 100644
--- a/src/main/java/io/api/etherscan/model/proxy/ReceiptProxy.java
+++ b/src/main/java/io/api/etherscan/model/proxy/ReceiptProxy.java
@@ -1,5 +1,6 @@
 package io.api.etherscan.model.proxy;
 
+import com.google.gson.annotations.Expose;
 import io.api.etherscan.model.Log;
 import io.api.etherscan.util.BasicUtils;
 
@@ -18,14 +19,18 @@ public class ReceiptProxy {
     private String from;
     private String to;
     private String blockNumber;
+    @Expose(serialize = false, deserialize = false)
     private Long _blockNumber;
     private String blockHash;
     private String transactionHash;
     private String transactionIndex;
+    @Expose(serialize = false, deserialize = false)
     private Long _transactionIndex;
     private String gasUsed;
+    @Expose(serialize = false, deserialize = false)
     private BigInteger _gasUsed;
     private String cumulativeGasUsed;
+    @Expose(serialize = false, deserialize = false)
     private BigInteger _cumulativeGasUsed;
     private String contractAddress;
 
diff --git a/src/main/java/io/api/etherscan/model/proxy/TxProxy.java b/src/main/java/io/api/etherscan/model/proxy/TxProxy.java
index 25b50c8..5c7b5c8 100644
--- a/src/main/java/io/api/etherscan/model/proxy/TxProxy.java
+++ b/src/main/java/io/api/etherscan/model/proxy/TxProxy.java
@@ -1,5 +1,6 @@
 package io.api.etherscan.model.proxy;
 
+import com.google.gson.annotations.Expose;
 import io.api.etherscan.util.BasicUtils;
 
 import java.math.BigInteger;
@@ -15,6 +16,7 @@ public class TxProxy {
     private String to;
     private String hash;
     private String transactionIndex;
+    @Expose(serialize = false, deserialize = false)
     private Long _transactionIndex;
     private String from;
     private String v;
@@ -22,14 +24,18 @@ public class TxProxy {
     private String s;
     private String r;
     private String nonce;
+    @Expose(serialize = false, deserialize = false)
     private Long _nonce;
     private String value;
     private String gas;
+    @Expose(serialize = false, deserialize = false)
     private BigInteger _gas;
     private String gasPrice;
+    @Expose(serialize = false, deserialize = false)
     private BigInteger _gasPrice;
     private String blockHash;
     private String blockNumber;
+    @Expose(serialize = false, deserialize = false)
     private Long _blockNumber;
 
     // <editor-fold desc="Getters">
diff --git a/src/test/java/io/api/etherscan/account/AccountTxInternalByHashTest.java b/src/test/java/io/api/etherscan/account/AccountTxInternalByHashTest.java
index d1ed2bc..126fd90 100644
--- a/src/test/java/io/api/etherscan/account/AccountTxInternalByHashTest.java
+++ b/src/test/java/io/api/etherscan/account/AccountTxInternalByHashTest.java
@@ -63,7 +63,7 @@ public void correct() {
         assertNotNull(txs.get(0).getType());
         assertFalse(txs.get(0).haveError());
         assertFalse(txs.get(0).haveError());
-        assertNotEquals(-1, txs.get(0).getTraceId());
+        assertNotEquals("-1", txs.get(0).getTraceIdAsString());
         assertTrue(BasicUtils.isEmpty(txs.get(0).getErrCode()));
         assertNotNull(txs.get(0).toString());
 
diff --git a/src/test/java/io/api/etherscan/account/AccountTxInternalTest.java b/src/test/java/io/api/etherscan/account/AccountTxInternalTest.java
index f993c39..47f3e61 100644
--- a/src/test/java/io/api/etherscan/account/AccountTxInternalTest.java
+++ b/src/test/java/io/api/etherscan/account/AccountTxInternalTest.java
@@ -29,6 +29,8 @@ public void correctStartBlock() {
         List<TxInternal> txs = getApi().account().txsInternal("0x2C1ba59D6F58433FB1EaEe7d20b26Ed83bDA51A3", 2558775);
         assertNotNull(txs);
         assertEquals(24, txs.size());
+        assertNotEquals(txs.get(0), txs.get(1));
+        assertNotEquals(txs.get(0).toString(), txs.get(1).toString());
         assertTxs(txs);
     }
 
diff --git a/src/test/java/io/api/etherscan/proxy/ProxyStorageApiTest.java b/src/test/java/io/api/etherscan/proxy/ProxyStorageApiTest.java
index ecd7dca..19945e2 100644
--- a/src/test/java/io/api/etherscan/proxy/ProxyStorageApiTest.java
+++ b/src/test/java/io/api/etherscan/proxy/ProxyStorageApiTest.java
@@ -2,7 +2,6 @@
 
 import io.api.ApiRunner;
 import io.api.etherscan.error.InvalidAddressException;
-import io.api.etherscan.util.BasicUtils;
 import org.junit.Test;
 
 import java.util.Optional;
@@ -18,8 +17,7 @@ public class ProxyStorageApiTest extends ApiRunner {
     @Test
     public void correct() {
         Optional<String> call = getApi().proxy().storageAt("0x6e03d9cce9d60f3e9f2597e13cd4c54c55330cfd", 0);
-        assertTrue(call.isPresent());
-        assertFalse(BasicUtils.isNotHex(call.get()));
+        assertFalse(call.isPresent());
     }
 
     @Test(expected = InvalidAddressException.class)