diff --git a/src/main/java/com/bitpay/sdk/util/serializer/Iso8601ToZonedDateTimeDeserializer.java b/src/main/java/com/bitpay/sdk/util/serializer/Iso8601ToZonedDateTimeDeserializer.java
index 334a920e..33c32102 100644
--- a/src/main/java/com/bitpay/sdk/util/serializer/Iso8601ToZonedDateTimeDeserializer.java
+++ b/src/main/java/com/bitpay/sdk/util/serializer/Iso8601ToZonedDateTimeDeserializer.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (c) 2019 BitPay.
+ * All rights reserved.
+ */
+
 package com.bitpay.sdk.util.serializer;
 
 import com.fasterxml.jackson.core.JsonParser;
diff --git a/src/main/java/com/bitpay/sdk/util/serializer/ZonedDateTimeToIso8601Serializer.java b/src/main/java/com/bitpay/sdk/util/serializer/ZonedDateTimeToIso8601Serializer.java
index d94f1195..cbc4f076 100644
--- a/src/main/java/com/bitpay/sdk/util/serializer/ZonedDateTimeToIso8601Serializer.java
+++ b/src/main/java/com/bitpay/sdk/util/serializer/ZonedDateTimeToIso8601Serializer.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (c) 2019 BitPay.
+ * All rights reserved.
+ */
+
 package com.bitpay.sdk.util.serializer;
 
 import com.fasterxml.jackson.core.JsonGenerator;
@@ -9,13 +14,14 @@
 
 public class ZonedDateTimeToIso8601Serializer extends JsonSerializer<ZonedDateTime> {
 
-    private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSX");
+    private static final DateTimeFormatter DATE_TIME_FORMATTER =
+        DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSX");
 
     /**
      * This method deserialize ZonedDateTime to format yyyy-mm-ddThh:mm:ssZ.
      *
-     * @param zonedDateTime ZonedDateTime
-     * @param jsonGenerator JsonGenerator
+     * @param zonedDateTime      ZonedDateTime
+     * @param jsonGenerator      JsonGenerator
      * @param serializerProvider SerializerProvider
      * @throws IOException IOException
      */