diff --git a/src/main/java/co/omise/models/Source.java b/src/main/java/co/omise/models/Source.java
index fdaf148e..dbf71a56 100644
--- a/src/main/java/co/omise/models/Source.java
+++ b/src/main/java/co/omise/models/Source.java
@@ -25,6 +25,7 @@ public class Source extends Model {
     private ChargeStatus chargeStatus;
     private String currency;
     private String email;
+    private String ip;
     private FlowType flow;
     @JsonProperty("installment_term")
     private long installmentTerm;
@@ -89,10 +90,18 @@ public String getEmail() {
         return this.email;
     }
 
+        public String getIp() {
+        return this.ip;
+    }
+
     public void setEmail(String email) {
         this.email = email;
     }
 
+    public void setIp(String ip) {
+        this.ip = ip;
+    }
+
     public FlowType getFlow() {
         return this.flow;
     }
@@ -217,6 +226,8 @@ public static class CreateRequestBuilder extends RequestBuilder<Source> {
         private String currency;
         @JsonProperty
         private String email;
+        @JsonProperty
+        private String ip;
         @JsonProperty("installment_term")
         private long installmentTerm;
         @JsonProperty("mobile_number")
@@ -282,6 +293,11 @@ public CreateRequestBuilder email(String email) {
             return this;
         }
 
+        public CreateRequestBuilder ip(String ip) {
+            this.ip = ip;
+            return this;
+        }
+
         public CreateRequestBuilder installmentTerm(long installmentTerm) {
             this.installmentTerm = installmentTerm;
             return this;
diff --git a/src/main/java/co/omise/models/SourceType.java b/src/main/java/co/omise/models/SourceType.java
index eb4bfb74..087e60b3 100644
--- a/src/main/java/co/omise/models/SourceType.java
+++ b/src/main/java/co/omise/models/SourceType.java
@@ -82,7 +82,9 @@ public enum SourceType {
     @JsonProperty("atome")
     Atome,
     @JsonProperty("duitnow_obw")
-    DuitNowOBW;
+    DuitNowOBW,
+    @JsonProperty("wechat_pay")
+    WeChatPay;
 
     @Override
     public String toString() {
diff --git a/src/main/java/co/omise/requests/Request.java b/src/main/java/co/omise/requests/Request.java
index 3a8feb61..0cde9b29 100644
--- a/src/main/java/co/omise/requests/Request.java
+++ b/src/main/java/co/omise/requests/Request.java
@@ -1,9 +1,12 @@
 package co.omise.requests;
 
+import java.io.IOException;
+
 import co.omise.Client;
 import co.omise.models.OmiseObjectBase;
 import okhttp3.HttpUrl;
 import okhttp3.RequestBody;
+import okio.Buffer;
 
 /**
  * Request is a base class, all extending classes would act as a holder class that encapsulate the information
@@ -70,6 +73,17 @@ public RequestBody getPayload() {
         return payload;
     }
 
+    /**
+     * Gets payload (request params).
+     *
+     * @return the payload as a readable string
+     */
+    public String getPayloadToString() throws IOException {
+        final Buffer buffer = new Buffer();
+        payload.writeTo(buffer);
+        return buffer.readUtf8();
+    }
+
     public ResponseType<T> getType() {
         return type;
     }
diff --git a/src/test/java/co/omise/live/LiveChargeRequestTest.java b/src/test/java/co/omise/live/LiveChargeRequestTest.java
index 42eba0b6..0b510eb8 100644
--- a/src/test/java/co/omise/live/LiveChargeRequestTest.java
+++ b/src/test/java/co/omise/live/LiveChargeRequestTest.java
@@ -637,4 +637,36 @@ public void testLiveChargeWithDuitNowOBW() throws IOException, OmiseException {
         assertEquals("affin", charge.getSource().getBank());
         assertEquals(FlowType.Redirect, charge.getSource().getFlow());
     }
+    @Test
+    @Ignore("only hit the network when we need to.")
+    public void testLiveChargeWithWechatPay() throws IOException, OmiseException {
+
+        Request<Source> sourceRequest = new Source.CreateRequestBuilder()
+                .type(SourceType.WeChatPay)
+                .amount(15000)
+                .currency("THB")
+                .ip("127.0.0.1")
+                .build();
+
+        Source source = client.sendRequest(sourceRequest);
+
+        Request<Charge> createChargeRequest =
+                new Charge.CreateRequestBuilder()
+                        .source(source.getId())
+                        .amount(15000)
+                        .currency("THB")
+                        .returnUri("http://example.com/")
+                        .build();
+
+        Charge charge = client.sendRequest(createChargeRequest);
+
+        System.out.println("created charge: " + charge.getId());
+
+        assertNotNull(charge.getId());
+        assertEquals(15000, charge.getAmount());
+        assertEquals("THB", charge.getCurrency());
+        assertEquals("127.0.0.1", charge.getSource().getIp());
+        assertEquals(SourceType.WeChatPay, charge.getSource().getType());
+        assertEquals(FlowType.AppRedirect, charge.getSource().getFlow());
+    }
 }
diff --git a/src/test/java/co/omise/models/SourceTypeTest.java b/src/test/java/co/omise/models/SourceTypeTest.java
index ef8061d7..bcf4b3b6 100644
--- a/src/test/java/co/omise/models/SourceTypeTest.java
+++ b/src/test/java/co/omise/models/SourceTypeTest.java
@@ -36,5 +36,6 @@ public void checkStringValue() {
         assertEquals("mobile_banking_ktb", SourceType.MobileBankingKtb.toString());
         assertEquals("atome", SourceType.Atome.toString());
         assertEquals("duitnow_obw", SourceType.DuitNowOBW.toString());
+        assertEquals("wechat_pay", SourceType.WeChatPay.toString());
     }
 }
diff --git a/src/test/java/co/omise/requests/SourceRequestTest.java b/src/test/java/co/omise/requests/SourceRequestTest.java
index 01b4c6a2..9cd3652b 100644
--- a/src/test/java/co/omise/requests/SourceRequestTest.java
+++ b/src/test/java/co/omise/requests/SourceRequestTest.java
@@ -1,5 +1,8 @@
 package co.omise.requests;
 
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 import co.omise.models.OmiseException;
 import co.omise.models.Source;
 import co.omise.models.SourceType;
@@ -45,4 +48,40 @@ public void testCreateInstallment() throws IOException, OmiseException {
         assertEquals("thb", source.getCurrency());
         assertEquals("redirect", source.getFlow().toString());
     }
+
+    @Test
+    public void testWeChatPaySourceIpMustBeNullWhenEmpty() throws IOException {
+        Request<Source> request = new TestSourceRequestBuilder()
+                .type(SourceType.WeChatPay)
+                .amount(500000)
+                .currency("thb")
+                .build();
+
+        // The key must exist in the request with a value of null
+        ObjectMapper objectMapper = new ObjectMapper();
+        JsonNode rootNode = objectMapper.readTree(request.getPayloadToString());
+
+        assertTrue(rootNode.has("ip"));
+        assertNull(rootNode.get("ip").textValue());
+
+    }
+
+    @Test
+    public void testWeChatPaySourceIpMustHaveValueWhenPassed() throws IOException {
+        String ip = "127.0.0.1";
+        Request<Source> request = new TestSourceRequestBuilder()
+                .type(SourceType.WeChatPay)
+                .amount(500000)
+                .ip(ip)
+                .currency("thb")
+                .build();
+
+        // The key must exist in the request with the passed value
+        ObjectMapper objectMapper = new ObjectMapper();
+        JsonNode rootNode = objectMapper.readTree(request.getPayloadToString());
+
+        assertTrue(rootNode.has("ip"));
+        assertEquals(rootNode.get("ip").textValue(), ip);
+
+    }
 }