diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3bf3a3c2..5932b360 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - a command line parameter to change the log level threshold of the log file
 - a parameter in a config file to specify the ciphers being used in the TLS protocol
 
+### Changed
+
+- t2iapi version to 4.1.0
+
 ### Fixed
 
 - a performance issue with xml unmarshalling due to finding an interface implementation for TransformerFactory
diff --git a/README.md b/README.md
index e69aee17..3c599866 100644
--- a/README.md
+++ b/README.md
@@ -133,7 +133,7 @@ Enable=true
 will make all devices match during discovery.
 
 ### Manipulation API
-The test tool uses *T2IAPI* version `3.0.0`. The *T2IAPI* is required for some test cases to put the DUT in a certain
+The test tool uses *T2IAPI* version `4.1.0`. The *T2IAPI* is required for some test cases to put the DUT in a certain
 state, or to trigger a certain behavior. When using SDCcc with automated manipulations, it must be ensured that the same
 version of *T2IAPI* is used for the test execution by both parties. It must also be ensured that the device's 
 manipulations are implemented according to the descriptions in the T2IAPI sources. Further information can be found 
diff --git a/pom.xml b/pom.xml
index 430c8d54..af7894db 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,7 @@
     </modules>
 
     <properties>
-        <revision>8.1.0</revision>
+        <revision>9.0.0</revision>
         <changelist>-SNAPSHOT</changelist>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <execPluginVersion>3.1.0</execPluginVersion>
diff --git a/sdccc/pom.xml b/sdccc/pom.xml
index 1a1d9a93..210f1fa8 100644
--- a/sdccc/pom.xml
+++ b/sdccc/pom.xml
@@ -172,7 +172,7 @@
         <dependency>
             <groupId>com.draeger.medical</groupId>
             <artifactId>t2iapi</artifactId>
-            <version>3.0.0</version>
+            <version>4.1.0</version>
         </dependency>
 
         <dependency>