diff --git a/library/src/main/java/com/pengrad/telegrambot/model/chatboost/source/ChatBoostSourceUnknown.java b/library/src/main/java/com/pengrad/telegrambot/model/chatboost/source/ChatBoostSourceUnknown.java
index 29c6d977..a430fa06 100644
--- a/library/src/main/java/com/pengrad/telegrambot/model/chatboost/source/ChatBoostSourceUnknown.java
+++ b/library/src/main/java/com/pengrad/telegrambot/model/chatboost/source/ChatBoostSourceUnknown.java
@@ -10,15 +10,16 @@ public class ChatBoostSourceUnknown extends ChatBoostSource implements Serializa
     public final static String CHAT_BOOST_TYPE = "unknown";
 
     @Override
-    public int hashCode() {
-        return Objects.hash(source, user);
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        return true;
     }
 
     @Override
     public String toString() {
         return "ChatBoostSourceUnknown{" +
-                "source='" + source + "'," +
-                "user='" + user + "'" +
                 '}';
     }
 }
diff --git a/library/src/main/java/com/pengrad/telegrambot/model/message/origin/MessageOriginUnknown.java b/library/src/main/java/com/pengrad/telegrambot/model/message/origin/MessageOriginUnknown.java
index d8700ade..c924a05a 100644
--- a/library/src/main/java/com/pengrad/telegrambot/model/message/origin/MessageOriginUnknown.java
+++ b/library/src/main/java/com/pengrad/telegrambot/model/message/origin/MessageOriginUnknown.java
@@ -20,12 +20,10 @@ public boolean equals(Object o) {
 
         return true;
     }
-    
+
     @Override
     public String toString() {
         return "MessageOriginUnknown{" +
-            "type='" + type + "'," +
-            "date='" + date + "'" +
             '}';
     }