diff --git a/README.md b/README.md
index caa0517..bfc0205 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ Add this dependency to your project's POM:
 <dependency>
   <groupId>jp.pay</groupId>
   <artifactId>payjp-java</artifactId>
-  <version>0.7.1</version>
+  <version>0.7.2</version>
 </dependency>
 ```
 
@@ -27,7 +27,7 @@ Add this dependency to your project's POM:
 Add this dependency to your project's build file:
 
 ```groovy
-compile "jp.pay:payjp-java:0.7.1"
+compile "jp.pay:payjp-java:0.7.2"
 ```
 
 ### Others
diff --git a/VERSION b/VERSION
index 39e898a..7486fdb 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.7.1
+0.7.2
diff --git a/pom.xml b/pom.xml
index a13909b..6ec2a81 100755
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
     <groupId>jp.pay</groupId>
     <artifactId>payjp-java</artifactId>
     <packaging>jar</packaging>
-    <version>0.7.1</version>
+    <version>0.7.2</version>
     <name>pay-java</name>
     <url>https://github.com/payjp/payjp-java</url>
     <dependencies>
diff --git a/src/main/java/jp/pay/Payjp.java b/src/main/java/jp/pay/Payjp.java
index bf041c7..6babbbb 100644
--- a/src/main/java/jp/pay/Payjp.java
+++ b/src/main/java/jp/pay/Payjp.java
@@ -25,7 +25,7 @@
 
 public abstract class Payjp {
 	public static final String LIVE_API_BASE = "https://api.pay.jp";
-	public static final String VERSION = "0.7.1";
+	public static final String VERSION = "0.7.2";
 	public static volatile String apiKey;
 	public static volatile String apiVersion;
 	public static volatile Integer maxRetry = 0;
diff --git a/src/main/java/jp/pay/model/Balance.java b/src/main/java/jp/pay/model/Balance.java
index b431460..e95d7e7 100644
--- a/src/main/java/jp/pay/model/Balance.java
+++ b/src/main/java/jp/pay/model/Balance.java
@@ -18,7 +18,7 @@ public class Balance extends APIResource {
 	List<Statement> statements;
 	String state;
 	Boolean closed;
-	String dueDate;
+	Long dueDate;
 	BankInfo bankInfo;
 
 	public Long getCreated() {
@@ -53,7 +53,7 @@ public Boolean getClosed() {
 		return closed;
 	}
 
-	public String getDueDate() {
+	public Long getDueDate() {
 		return dueDate;
 	}
 
diff --git a/src/test/java/jp/pay/model/BalanceTest.java b/src/test/java/jp/pay/model/BalanceTest.java
index 4da716c..1ba05db 100644
--- a/src/test/java/jp/pay/model/BalanceTest.java
+++ b/src/test/java/jp/pay/model/BalanceTest.java
@@ -51,7 +51,7 @@ public void testDeserialize() throws PayjpException, IOException {
 		assertEquals("ten_4f2a6b6b8f4b0f1e8b0fa8bca8b0", balance.getTenantId());
 		assertEquals("collecting", balance.getState());
 		assertEquals(Boolean.FALSE, balance.getClosed());
-		assertEquals(null, balance.getDueDate());
+		assertEquals(Long.valueOf("1711897200"), balance.getDueDate());
 
 		BankInfo bankInfo = balance.getBankInfo();
 		assertEquals("0000", bankInfo.getBankCode());
diff --git a/src/test/resources/jp/pay/model/balance.json b/src/test/resources/jp/pay/model/balance.json
index f73df80..319ab1f 100755
--- a/src/test/resources/jp/pay/model/balance.json
+++ b/src/test/resources/jp/pay/model/balance.json
@@ -70,7 +70,7 @@
     }
   ],
   "closed": false,
-  "due_date": null,
+  "due_date": 1711897200,
   "bank_info": {
     "bank_code": "0000",
     "bank_branch_code": "123",