diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index d65b5a5a2..b595afadb 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,9 +1,9 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 4.2.1
+current_version = 4.3.0
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?
-serialize =
+serialize = 
 	{major}.{minor}.{patch}
 
 [bumpversion:file:build.gradle]
diff --git a/README.md b/README.md
index 5cb5f2f73..b6802b1f2 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ For Gradle 3.4 or Higher:
 
 ```groovy
 dependencies {
-    implementation 'com.nexmo:client:4.2.1'
+    implementation 'com.nexmo:client:4.3.0'
 }
 ```
 
@@ -40,7 +40,7 @@ For older versions:
 
 ```groovy
 dependencies {
-    compile 'com.nexmo:client:4.2.1'
+    compile 'com.nexmo:client:4.3.0'
 }
 ```
 
@@ -52,7 +52,7 @@ Add the following to the correct place in your project's POM file:
 <dependency>
       <groupId>com.nexmo</groupId>
       <artifactId>client</artifactId>
-      <version>4.2.1</version>
+      <version>4.3.0</version>
 </dependency>
 ```
 
diff --git a/build.gradle b/build.gradle
index 024a887b8..31af57ae4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,7 +20,7 @@ apply plugin: 'eclipse'
 
 group = "com.nexmo"
 archivesBaseName = "client"
-version = "4.2.1"
+version = "4.3.0"
 
 sourceCompatibility = "1.8"
 targetCompatibility = "1.8"
diff --git a/src/main/java/com/nexmo/client/HttpWrapper.java b/src/main/java/com/nexmo/client/HttpWrapper.java
index 602fb3e16..dae885a5d 100644
--- a/src/main/java/com/nexmo/client/HttpWrapper.java
+++ b/src/main/java/com/nexmo/client/HttpWrapper.java
@@ -37,7 +37,7 @@
  */
 public class HttpWrapper {
     private static final String CLIENT_NAME = "nexmo-java";
-    private static final String CLIENT_VERSION = "4.2.1";
+    private static final String CLIENT_VERSION = "4.3.0";
     private static final String JAVA_VERSION = System.getProperty("java.version");
 
     private AuthCollection authCollection;