diff --git a/jackson/src/test/java/com/baeldung/jackson/bidirection/CustomListDeserializer.java b/jackson/src/test/java/com/baeldung/jackson/bidirection/CustomListDeserializer.java
index 5f1f1edf2b..c00316e365 100644
--- a/jackson/src/test/java/com/baeldung/jackson/bidirection/CustomListDeserializer.java
+++ b/jackson/src/test/java/com/baeldung/jackson/bidirection/CustomListDeserializer.java
@@ -7,9 +7,19 @@ import java.util.List;
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.DeserializationContext;
-import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 
-public class CustomListDeserializer extends JsonDeserializer<List<ItemWithSerializer>> {
+public class CustomListDeserializer extends StdDeserializer<List<ItemWithSerializer>> {
+
+    private static final long serialVersionUID = 1095767961632979804L;
+
+    public CustomListDeserializer() {
+        this(null);
+    }
+
+    public CustomListDeserializer(final Class<?> vc) {
+        super(vc);
+    }
 
     @Override
     public List<ItemWithSerializer> deserialize(final JsonParser jsonparser, final DeserializationContext context) throws IOException, JsonProcessingException {
diff --git a/jackson/src/test/java/com/baeldung/jackson/date/CustomDateDeserializer.java b/jackson/src/test/java/com/baeldung/jackson/date/CustomDateDeserializer.java
index a63190c8f5..90c7d9fbac 100644
--- a/jackson/src/test/java/com/baeldung/jackson/date/CustomDateDeserializer.java
+++ b/jackson/src/test/java/com/baeldung/jackson/date/CustomDateDeserializer.java
@@ -8,12 +8,21 @@ import java.util.Date;
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.DeserializationContext;
-import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 
-public class CustomDateDeserializer extends JsonDeserializer<Date> {
+public class CustomDateDeserializer extends StdDeserializer<Date> {
 
+    private static final long serialVersionUID = -5451717385630622729L;
     private SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy hh:mm:ss");
 
+    public CustomDateDeserializer() {
+        this(null);
+    }
+
+    public CustomDateDeserializer(final Class<?> vc) {
+        super(vc);
+    }
+
     @Override
     public Date deserialize(final JsonParser jsonparser, final DeserializationContext context) throws IOException, JsonProcessingException {
         final String date = jsonparser.getText();
diff --git a/jackson/src/test/java/com/baeldung/jackson/deserialization/ItemDeserializer.java b/jackson/src/test/java/com/baeldung/jackson/deserialization/ItemDeserializer.java
index 3be6685103..e9c89b8c78 100644
--- a/jackson/src/test/java/com/baeldung/jackson/deserialization/ItemDeserializer.java
+++ b/jackson/src/test/java/com/baeldung/jackson/deserialization/ItemDeserializer.java
@@ -2,17 +2,26 @@ package com.baeldung.jackson.deserialization;
 
 import java.io.IOException;
 
-import com.baeldung.jackson.dtos.User;
 import com.baeldung.jackson.dtos.Item;
-
+import com.baeldung.jackson.dtos.User;
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.DeserializationContext;
-import com.fasterxml.jackson.databind.JsonDeserializer;
 import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 import com.fasterxml.jackson.databind.node.IntNode;
 
-public class ItemDeserializer extends JsonDeserializer<Item> {
+public class ItemDeserializer extends StdDeserializer<Item> {
+
+    private static final long serialVersionUID = 1883547683050039861L;
+
+    public ItemDeserializer() {
+        this(null);
+    }
+
+    public ItemDeserializer(final Class<?> vc) {
+        super(vc);
+    }
 
     /**
      * {"id":1,"itemNr":"theItem","owner":2}
diff --git a/jackson/src/test/java/com/baeldung/jackson/deserialization/ItemDeserializerOnClass.java b/jackson/src/test/java/com/baeldung/jackson/deserialization/ItemDeserializerOnClass.java
index 169a5c1c50..2036780e99 100644
--- a/jackson/src/test/java/com/baeldung/jackson/deserialization/ItemDeserializerOnClass.java
+++ b/jackson/src/test/java/com/baeldung/jackson/deserialization/ItemDeserializerOnClass.java
@@ -4,15 +4,24 @@ import java.io.IOException;
 
 import com.baeldung.jackson.dtos.ItemWithSerializer;
 import com.baeldung.jackson.dtos.User;
-
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.DeserializationContext;
-import com.fasterxml.jackson.databind.JsonDeserializer;
 import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 import com.fasterxml.jackson.databind.node.IntNode;
 
-public class ItemDeserializerOnClass extends JsonDeserializer<ItemWithSerializer> {
+public class ItemDeserializerOnClass extends StdDeserializer<ItemWithSerializer> {
+
+    private static final long serialVersionUID = 5579141241817332594L;
+
+    public ItemDeserializerOnClass() {
+        this(null);
+    }
+
+    public ItemDeserializerOnClass(final Class<?> vc) {
+        super(vc);
+    }
 
     /**
      * {"id":1,"itemNr":"theItem","owner":2}
diff --git a/jackson/src/test/java/com/baeldung/jackson/try1/RestLoaderRequestDeserializer.java b/jackson/src/test/java/com/baeldung/jackson/try1/RestLoaderRequestDeserializer.java
index 849607586d..529c05ddcc 100644
--- a/jackson/src/test/java/com/baeldung/jackson/try1/RestLoaderRequestDeserializer.java
+++ b/jackson/src/test/java/com/baeldung/jackson/try1/RestLoaderRequestDeserializer.java
@@ -6,10 +6,19 @@ import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.core.ObjectCodec;
 import com.fasterxml.jackson.databind.DeserializationContext;
-import com.fasterxml.jackson.databind.JsonDeserializer;
 import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 
-public class RestLoaderRequestDeserializer extends JsonDeserializer<RestLoaderRequest<IEntity>> {
+public class RestLoaderRequestDeserializer extends StdDeserializer<RestLoaderRequest<IEntity>> {
+    private static final long serialVersionUID = -4245207329377196889L;
+
+    public RestLoaderRequestDeserializer() {
+        this(null);
+    }
+
+    public RestLoaderRequestDeserializer(final Class<?> vc) {
+        super(vc);
+    }
 
     @Override
     public RestLoaderRequest<IEntity> deserialize(final JsonParser jp, final DeserializationContext ctxt) throws IOException, JsonProcessingException {