diff --git a/README.md b/README.md
index 9187e1d94..6aa035109 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,7 @@ You can use Maven and add this dependency to your project's POM:
 <dependency>
   <groupId>com.adyen</groupId>
   <artifactId>adyen-java-api-library</artifactId>
-  <version>28.3.1</version>
+  <version>28.4.0</version>
 </dependency>
 ```
 
@@ -240,7 +240,7 @@ client.setHttpClient(adyenHttpClientWithProxy);
 If your proxy requires authentication, set all the settings as system properties instead (don't mix with previous approach), for example: 
 
 ~~~~ java
-System.setProperty("https.proxyHost", "128.3.1.1");
+System.setProperty("https.proxyHost", "128.4.0.1");
 System.setProperty("https.proxyPort", "3128");
 System.setProperty("https.proxyUser", "squid");
 System.setProperty("https.proxyPassword", "ward");
diff --git a/VERSION b/VERSION
index e5ef00e64..01e76feaa 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-28.3.1
+28.4.0
diff --git a/pom.xml b/pom.xml
index 0fb1fe3c3..44833179a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <groupId>com.adyen</groupId>
     <artifactId>adyen-java-api-library</artifactId>
     <packaging>jar</packaging>
-    <version>28.3.1</version>
+    <version>28.4.0</version>
     <name>Adyen Java API Library</name>
     <description>Adyen API Client Library for Java</description>
     <url>https://github.com/adyen/adyen-java-api-library</url>
diff --git a/src/main/java/com/adyen/Client.java b/src/main/java/com/adyen/Client.java
index 5c154b468..d5a155478 100644
--- a/src/main/java/com/adyen/Client.java
+++ b/src/main/java/com/adyen/Client.java
@@ -10,7 +10,7 @@ public class Client {
     private ClientInterface httpClient;
     private Config config;
     public static final String LIB_NAME = "adyen-java-api-library";
-    public static final String LIB_VERSION = "28.3.1";
+    public static final String LIB_VERSION = "28.4.0";
     public static final String TERMINAL_API_ENDPOINT_TEST = "https://terminal-api-test.adyen.com";
     public static final String TERMINAL_API_ENDPOINT_LIVE = "https://terminal-api-live.adyen.com";