diff --git a/README.md b/README.md
index fb72d64..d6ce6fc 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ Use 3.x to access the api via https://api.lexware.io instead of https://api.lexo
 
 | lexoffice-java-sdk | Java | Spring Boot |
 |--------------------|------|-------------|
+| 3.5                | 21   | 4.0.x       |
 | 3.2                | 21   | 3.5.x       |
 | 3.0                | 21   | 3.4.x       |
 | 2.1                | 21   | 3.4.x       |
diff --git a/pom.xml b/pom.xml
index 38eb75e..123ff62 100644
--- a/pom.xml
+++ b/pom.xml
@@ -59,7 +59,7 @@
         <maven.compiler.target>21</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
-        <spring-boot.version>3.5.5</spring-boot.version>
+        <spring-boot.version>4.0.1</spring-boot.version>
         <guava.version>33.5.0-jre</guava.version>
     </properties>