diff --git a/cobigen/cobigen-tsplugin/pom.xml b/cobigen/cobigen-tsplugin/pom.xml
index 7437ba75f8..ce974c6c28 100644
--- a/cobigen/cobigen-tsplugin/pom.xml
+++ b/cobigen/cobigen-tsplugin/pom.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <artifactId>tsplugin</artifactId>
   <name>CobiGen - TypeScript Plug-in</name>
-  <version>2.4.2</version>
+  <version>2.4.3</version>
   <packaging>jar</packaging>
   <description>CobiGen - TypeScript Plug-in</description>
 
@@ -15,7 +15,7 @@
   <properties>
     <plugin.name>${project.artifactId}</plugin.name>
     <server.name>nestserver</server.name>
-    <server.version>1.1.2</server.version>
+    <server.version>1.1.5</server.version>
     <server.url>https\://registry.npmjs.org/@devonfw/cobigen-nestserver/-/cobigen-nestserver-${server.version}.tgz</server.url>
     <server.url.linux>https\://registry.npmjs.org/@devonfw/cobigen-nestserver-linux/-/cobigen-nestserver-linux-${server.version}.tgz</server.url.linux>
     <server.url.macos>https\://registry.npmjs.org/@devonfw/cobigen-nestserver-macos/-/cobigen-nestserver-macos-${server.version}.tgz</server.url.macos>
diff --git a/cobigen/cobigen-tsplugin/src/test/java/com/devonfw/cobigen/tsplugin/merger/TypeScriptMergerTest.java b/cobigen/cobigen-tsplugin/src/test/java/com/devonfw/cobigen/tsplugin/merger/TypeScriptMergerTest.java
index 2d4bf74364..496f6a320e 100644
--- a/cobigen/cobigen-tsplugin/src/test/java/com/devonfw/cobigen/tsplugin/merger/TypeScriptMergerTest.java
+++ b/cobigen/cobigen-tsplugin/src/test/java/com/devonfw/cobigen/tsplugin/merger/TypeScriptMergerTest.java
@@ -186,4 +186,17 @@ private String readTSFile(String fileName) {
         return returnString;
     }
 
+    /**
+     * Tests if TypeScript can handle null- and undefined-aware types
+     *
+     * @test fails
+     */
+    @Test
+    public void testNullAndUndefinedTypes() {
+        TypeScriptMerger tsMerger = new TypeScriptMerger("tsmerge", false);
+        File baseFile = new File(testFileRootPath + "nullBase.ts");
+        String mergedContents = tsMerger.merge(baseFile, readTSFile("nullPatch.ts"), "UTF-8");
+        assertEquals(false, mergedContents.contains("Not able to merge") || mergedContents.isEmpty());
+    }
+
 }
diff --git a/cobigen/cobigen-tsplugin/src/test/resources/testdata/unittest/files/nullBase.ts b/cobigen/cobigen-tsplugin/src/test/resources/testdata/unittest/files/nullBase.ts
new file mode 100644
index 0000000000..e754a673e3
--- /dev/null
+++ b/cobigen/cobigen-tsplugin/src/test/resources/testdata/unittest/files/nullBase.ts
@@ -0,0 +1,4 @@
+export class SomeDataList {
+  somedataSearchCriteria: SomeDataSearchCriteria = {
+  };
+}
\ No newline at end of file
diff --git a/cobigen/cobigen-tsplugin/src/test/resources/testdata/unittest/files/nullPatch.ts b/cobigen/cobigen-tsplugin/src/test/resources/testdata/unittest/files/nullPatch.ts
new file mode 100644
index 0000000000..a545a619eb
--- /dev/null
+++ b/cobigen/cobigen-tsplugin/src/test/resources/testdata/unittest/files/nullPatch.ts
@@ -0,0 +1,6 @@
+export class SomeDataList {
+  somedataSearchCriteria: SomeDataSearchCriteria = {
+    AnyString: null,
+    AnotherString: undefined,
+  };
+}
\ No newline at end of file
diff --git a/documentation/master-cobigen.asciidoc b/documentation/master-cobigen.asciidoc
index 63fbfbfc05..ee96a42fab 100644
--- a/documentation/master-cobigen.asciidoc
+++ b/documentation/master-cobigen.asciidoc
@@ -14,7 +14,7 @@ This document contains the documentation of the CobiGen core module as well as a
 * CobiGen v6.1.0
 * CobiGen - Java Plug-in v2.2.0
 * CobiGen - XML Plug-in v4.2.0
-* CobiGen - TypeScript Plug-in v2.4.2
+* CobiGen - TypeScript Plug-in v2.4.3
 * CobiGen - Property Plug-in v2.1.0
 * CobiGen - Text Merger v2.1.0
 * CobiGen - JSON Plug-in v2.1.0