diff --git a/rskj-core/src/main/java/org/ethereum/rpc/parameters/CallArgumentsParam.java b/rskj-core/src/main/java/org/ethereum/rpc/parameters/CallArgumentsParam.java
index 96134328f51..4982b25f0dc 100644
--- a/rskj-core/src/main/java/org/ethereum/rpc/parameters/CallArgumentsParam.java
+++ b/rskj-core/src/main/java/org/ethereum/rpc/parameters/CallArgumentsParam.java
@@ -24,7 +24,9 @@
 import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 import org.ethereum.rpc.CallArguments;
 
+import javax.annotation.Nullable;
 import java.io.IOException;
+import java.util.function.Function;
 
 @JsonDeserialize(using = CallArgumentsParam.Deserializer.class)
 public class CallArgumentsParam {
@@ -137,18 +139,28 @@ public static class Deserializer extends StdDeserializer<CallArgumentsParam> {
         public CallArgumentsParam deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
             JsonNode node =  jp.getCodec().readTree(jp);
 
-            HexAddressParam from = node.has("from") ? new HexAddressParam(node.get("from").asText()) : null;
-            HexAddressParam to = node.has("to") ? new HexAddressParam(node.get("to").asText()) : null;
-            HexNumberParam gas = node.has("gas") ? new HexNumberParam(node.get("gas").asText()) : null;
-            HexNumberParam gasPrice = node.has("gasPrice") ? new HexNumberParam(node.get("gasPrice").asText()) : null;
-            HexNumberParam gasLimit = node.has("gasLimit") ? new HexNumberParam(node.get("gasLimit").asText()) : null;
-            HexNumberParam nonce = node.has("nonce") ? new HexNumberParam(node.get("nonce").asText()) : null;
-            HexNumberParam chainId = node.has("chainId") ? new HexNumberParam(node.get("chainId").asText()) : null;
-            HexNumberParam value = node.has("value") ? new HexNumberParam(node.get("value").asText()) : null;
-            HexDataParam data = node.has("data") ? new HexDataParam(node.get("data").asText()) : null;
-            HexDataParam input = node.has("input") ? new HexDataParam(node.get("input").asText()) : null;
+            HexAddressParam from = paramOrNull(node, "from", HexAddressParam::new);
+            HexAddressParam to = paramOrNull(node, "to", HexAddressParam::new);
+            HexNumberParam gas = paramOrNull(node, "gas", HexNumberParam::new);
+            HexNumberParam gasPrice = paramOrNull(node, "gasPrice", HexNumberParam::new);
+            HexNumberParam gasLimit = paramOrNull(node, "gasLimit", HexNumberParam::new);
+            HexNumberParam nonce = paramOrNull(node, "nonce", HexNumberParam::new);
+            HexNumberParam chainId = paramOrNull(node, "chainId", HexNumberParam::new);
+            HexNumberParam value = paramOrNull(node, "value", HexNumberParam::new);
+            HexDataParam data = paramOrNull(node, "data", HexDataParam::new);
+            HexDataParam input = paramOrNull(node, "input", HexDataParam::new);
 
             return new CallArgumentsParam(from, to, gas, gasPrice, gasLimit, nonce, chainId, value, data, input);
         }
+
+        @Nullable
+        private static <T> T paramOrNull(JsonNode node, String fieldName, Function<String, T> paramFactory) {
+            JsonNode fieldNode = node.get(fieldName);
+            if (fieldNode == null || fieldNode.isNull()) {
+                return null;
+            }
+
+            return paramFactory.apply(fieldNode.asText());
+        }
     }
 }
diff --git a/rskj-core/src/test/java/org/ethereum/rpc/parameters/CallArgumentsParamTest.java b/rskj-core/src/test/java/org/ethereum/rpc/parameters/CallArgumentsParamTest.java
index 1a89239437f..a86d8a05f5b 100644
--- a/rskj-core/src/test/java/org/ethereum/rpc/parameters/CallArgumentsParamTest.java
+++ b/rskj-core/src/test/java/org/ethereum/rpc/parameters/CallArgumentsParamTest.java
@@ -13,14 +13,15 @@ public class CallArgumentsParamTest {
 
     private final ObjectMapper objectMapper = new ObjectMapper();
 
-    private final String FROM = "0x7986b3df570230288501eea3d890bd66948c9b79";
-    private final String TO = "0xe7b8e91401bf4d1669f54dc5f98109d7efbc4eea";
-    private final String GAS = "0x76c0";
-    private final String GAS_PRICE = "0x9184e72a000";
-    private final String VALUE = "0x9184e72a";
-    private final String DATA = "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675";
-    private final String NONCE = "0x1";
-    private final String CHAIN_ID = "0x539";
+    private static final String FROM = "0x7986b3df570230288501eea3d890bd66948c9b79";
+    private static final String TO = "0xe7b8e91401bf4d1669f54dc5f98109d7efbc4eea";
+    private static final String GAS = "0x76c0";
+    private static final String GAS_PRICE = "0x9184e72a000";
+    private static final String VALUE = "0x9184e72a";
+    private static final String DATA = "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675";
+    private static final String NONCE = "0x1";
+    private static final String CHAIN_ID = "0x539";
+    private static final String NULL = "null";
 
     @Test
     public void testValidCallArgumentsParam() throws JsonProcessingException {
@@ -200,4 +201,50 @@ public void testToCallArgumentsWithInput() {
         assertEquals(DATA, callArguments.getData());
         assertEquals(DATA, callArguments.getInput());
     }
+
+    @Test
+    public void testNullCallArgumentsParams() throws JsonProcessingException {
+        String callArgumentsInput = "{\n" +
+                "            \"from\": " + NULL + ", " +
+                "            \"to\" : " + NULL + ", " +
+                "            \"gas\": " + NULL + ", " +
+                "            \"gasPrice\": " + NULL + ", " +
+                "            \"value\": " + NULL + ", " +
+                "            \"data\": " + NULL + ", " +
+                "            \"nonce\": " + NULL + ", " +
+                "            \"chainId\": " + NULL + "}";
+
+        JsonNode jsonNode = objectMapper.readTree(callArgumentsInput);
+        CallArgumentsParam callArgumentsParam = objectMapper.convertValue(jsonNode, CallArgumentsParam.class);
+
+        assertNotNull(callArgumentsParam);
+
+        assertNull(callArgumentsParam.getFrom());
+        assertNull(callArgumentsParam.getTo());
+        assertNull(callArgumentsParam.getGas());
+        assertNull(callArgumentsParam.getGasPrice());
+        assertNull(callArgumentsParam.getValue());
+        assertNull(callArgumentsParam.getData());
+        assertNull(callArgumentsParam.getNonce());
+        assertNull(callArgumentsParam.getChainId());
+    }
+
+    @Test
+    public void testNoCallArgumentsParams() throws JsonProcessingException {
+        String callArgumentsInput = "{ }";
+
+        JsonNode jsonNode = objectMapper.readTree(callArgumentsInput);
+        CallArgumentsParam callArgumentsParam = objectMapper.convertValue(jsonNode, CallArgumentsParam.class);
+
+        assertNotNull(callArgumentsParam);
+
+        assertNull(callArgumentsParam.getFrom());
+        assertNull(callArgumentsParam.getTo());
+        assertNull(callArgumentsParam.getGas());
+        assertNull(callArgumentsParam.getGasPrice());
+        assertNull(callArgumentsParam.getValue());
+        assertNull(callArgumentsParam.getData());
+        assertNull(callArgumentsParam.getNonce());
+        assertNull(callArgumentsParam.getChainId());
+    }
 }