diff --git a/pom.xml b/pom.xml
index fb5c4ca..fbded64 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
     </developers>
 
     <properties>
-        <postmark.version>1.0.0</postmark.version>
+        <postmark.version>1.0.1</postmark.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
         <junit.jupiter.version>5.0.0-M4</junit.jupiter.version>
diff --git a/src/main/java/com/wildbit/java/postmark/client/data/model/messages/OutboundMessage.java b/src/main/java/com/wildbit/java/postmark/client/data/model/messages/OutboundMessage.java
index 758ea84..a2bbb4e 100644
--- a/src/main/java/com/wildbit/java/postmark/client/data/model/messages/OutboundMessage.java
+++ b/src/main/java/com/wildbit/java/postmark/client/data/model/messages/OutboundMessage.java
@@ -17,7 +17,7 @@ public class OutboundMessage {
     private Date receivedAt;
     private String from;
     private String subject;
-    private ArrayList<Attachment> attachments;
+    private ArrayList<String> attachments;
     private String status;
     private Boolean trackOpens;
     private String trackLinks;
@@ -96,11 +96,11 @@ public void setSubject(String subject) {
         this.subject = subject;
     }
 
-    public ArrayList<Attachment> getAttachments() {
+    public ArrayList<String> getAttachments() {
         return attachments;
     }
 
-    public void setAttachments(ArrayList<Attachment> attachments) {
+    public void setAttachments(ArrayList<String> attachments) {
         this.attachments = attachments;
     }
 
diff --git a/src/test/java/integration/DomainTest.java b/src/test/java/integration/DomainTest.java
index 165ae89..cfb200c 100644
--- a/src/test/java/integration/DomainTest.java
+++ b/src/test/java/integration/DomainTest.java
@@ -2,18 +2,14 @@
 
 import base.BaseTest;
 import com.wildbit.java.postmark.client.AccountApiClient;
-import com.wildbit.java.postmark.client.ApiClient;
 import com.wildbit.java.postmark.client.Parameters;
 import com.wildbit.java.postmark.client.data.model.domains.DomainDetails;
 import com.wildbit.java.postmark.client.data.model.domains.Domains;
-import com.wildbit.java.postmark.client.data.model.templates.*;
 import com.wildbit.java.postmark.client.exception.PostmarkException;
 import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
-import java.util.HashMap;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
diff --git a/src/test/java/integration/SendersTest.java b/src/test/java/integration/SendersTest.java
index dc0b411..396f58a 100644
--- a/src/test/java/integration/SendersTest.java
+++ b/src/test/java/integration/SendersTest.java
@@ -3,8 +3,6 @@
 import base.BaseTest;
 import com.wildbit.java.postmark.client.AccountApiClient;
 import com.wildbit.java.postmark.client.Parameters;
-import com.wildbit.java.postmark.client.data.model.domains.DomainDetails;
-import com.wildbit.java.postmark.client.data.model.domains.Domains;
 import com.wildbit.java.postmark.client.data.model.senders.SignatureDetails;
 import com.wildbit.java.postmark.client.data.model.senders.Signatures;
 import com.wildbit.java.postmark.client.exception.PostmarkException;
diff --git a/src/test/java/integration/ServersTest.java b/src/test/java/integration/ServersTest.java
index 9817438..c94a3d5 100644
--- a/src/test/java/integration/ServersTest.java
+++ b/src/test/java/integration/ServersTest.java
@@ -9,8 +9,6 @@
 
 import java.io.IOException;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 /**
diff --git a/src/test/java/unit/client/HttpClientTest.java b/src/test/java/unit/client/HttpClientTest.java
index 87191e6..ce29d3e 100644
--- a/src/test/java/unit/client/HttpClientTest.java
+++ b/src/test/java/unit/client/HttpClientTest.java
@@ -10,7 +10,6 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 
 public class HttpClientTest {
diff --git a/src/test/java/unit/data/MessageTest.java b/src/test/java/unit/data/MessageTest.java
index 57cd887..12a0bff 100644
--- a/src/test/java/unit/data/MessageTest.java
+++ b/src/test/java/unit/data/MessageTest.java
@@ -2,16 +2,13 @@
 
 
 import base.BaseTest;
-import com.wildbit.java.postmark.client.Parameters;
 import com.wildbit.java.postmark.client.data.DataHandler;
 import com.wildbit.java.postmark.client.data.model.message.Message;
-import com.wildbit.java.postmark.client.exception.InvalidMessageException;
 import org.junit.jupiter.api.Test;
 
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Base64;
 import java.util.HashMap;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;