diff --git a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin-model/pom.xml b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin-model/pom.xml
index cf08999cd2..e4a2d20ed3 100644
--- a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin-model/pom.xml
+++ b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin-model/pom.xml
@@ -1,7 +1,7 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <artifactId>openapiplugin-model</artifactId>
-  <version>7.0.0</version>
+  <version>7.1.0</version>
   <name>CobiGen Openapiplugin Model</name>
   <packaging>jar</packaging>
   <description>CobiGen - OpenAPI Plug-in Model</description>
diff --git a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/pom.xml b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/pom.xml
index 688ed34951..33c6289569 100644
--- a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/pom.xml
+++ b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/pom.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <artifactId>openapiplugin</artifactId>
   <name>CobiGen - Open API Plug-in</name>
-  <version>7.0.0</version>
+  <version>7.1.0</version>
   <packaging>jar</packaging>
   <description>CobiGen - OpenAPI Plug-in</description>
 
diff --git a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/main/java/com/devonfw/cobigen/openapiplugin/inputreader/OpenAPIInputReader.java b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/main/java/com/devonfw/cobigen/openapiplugin/inputreader/OpenAPIInputReader.java
index c9f3922f21..ce29c8a2e8 100644
--- a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/main/java/com/devonfw/cobigen/openapiplugin/inputreader/OpenAPIInputReader.java
+++ b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/main/java/com/devonfw/cobigen/openapiplugin/inputreader/OpenAPIInputReader.java
@@ -401,7 +401,11 @@ private List<PropertyDef> extractProperties(OpenApi3 openApi, String componentNa
 
                 List<String> enumElements = new ArrayList<>();
                 for (Object element : enums) {
-                    enumElements.add(element.toString());
+                    if (element != null) {
+                        enumElements.add(element.toString());
+                    } else {
+                        enumElements.add("null");
+                    }
                 }
                 propModel.setEnumElements(enumElements);
             }
diff --git a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/test/java/com/devonfw/cobigen/openapiplugin/unittest/inputreader/OpenAPIInputReaderTest.java b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/test/java/com/devonfw/cobigen/openapiplugin/unittest/inputreader/OpenAPIInputReaderTest.java
index e6bd24c18c..532a21e8d2 100644
--- a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/test/java/com/devonfw/cobigen/openapiplugin/unittest/inputreader/OpenAPIInputReaderTest.java
+++ b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/test/java/com/devonfw/cobigen/openapiplugin/unittest/inputreader/OpenAPIInputReaderTest.java
@@ -279,6 +279,29 @@ public void testInvalidPath() throws Exception {
         List<Object> inputObjects = getInputs("invalidPath.yaml");
     }
 
+    /**
+     * Tests if the input reader can handle nullable enums. See:
+     * https://github.com/devonfw/cobigen/issues/1244
+     *
+     * @throws Exception
+     */
+    @Test
+    public void testNullableEnum() throws Exception {
+        List<Object> inputObjects = getInputs("nullableEnum.yaml");
+
+        for (Object o : inputObjects) {
+            if (isEntityDef(o)) {
+                EntityDef entity = (EntityDef) o;
+                List<PropertyDef> properties = entity.getProperties();
+                for (PropertyDef p : properties) {
+                    List<String> enums = p.getEnumElements();
+                    assertThat(enums.get(0)).isEqualTo("enum1");
+                    assertThat(enums.get(1)).isEqualTo("null");
+                }
+            }
+        }
+    }
+
     @Test(expected = InvalidConfigurationException.class)
     public void testInvalidXComponent() throws Exception {
         List<Object> inputObjects = getInputs("invalidXComponent.yaml");
@@ -414,4 +437,14 @@ private boolean isComponentDef(Object o) {
         return o.getClass() == ComponentDef.class;
     }
 
+    /**
+     * Checks whether the object is an {@link EntityDef}
+     * @param o
+     *            object to check whether it is an EntityDef
+     * @return true if it is an EntityDef
+     */
+    private boolean isPropertyDef(Object o) {
+        return o.getClass() == PropertyDef.class;
+    }
+
 }
diff --git a/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/test/resources/testdata/unittest/OpenAPIInputReaderTest/nullableEnum.yaml b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/test/resources/testdata/unittest/OpenAPIInputReaderTest/nullableEnum.yaml
new file mode 100644
index 0000000000..2df91b9b91
--- /dev/null
+++ b/cobigen/cobigen-openapiplugin-parent/cobigen-openapiplugin/src/test/resources/testdata/unittest/OpenAPIInputReaderTest/nullableEnum.yaml
@@ -0,0 +1,36 @@
+openapi: 3.0.0
+servers:
+  - url: 'https://localhost:8081/server/services/rest'
+info:
+  title: Devon Example
+  description: Example of a API definition
+  version: 1.0.0
+paths:
+  /tablemanagement/v1/table/{id}:
+    get:
+      operationId: findTable
+      parameters:
+        - name: id
+          in: path
+          required: true
+          schema:
+            type: integer
+            format: int64
+            minimum: 0
+            maximum: 50
+      responses:
+        '200':
+          description: Any
+components:
+    schemas:
+        Table:
+          x-component: tablemanagament
+          description: Entity definiton of Table
+          type: object
+          properties:
+            myenum: 
+               type: string
+               nullable: true
+               enum: 
+                  - enum1
+                  - null
\ No newline at end of file
diff --git a/documentation/master-cobigen.asciidoc b/documentation/master-cobigen.asciidoc
index b956a5b625..1c394b26d1 100644
--- a/documentation/master-cobigen.asciidoc
+++ b/documentation/master-cobigen.asciidoc
@@ -25,7 +25,7 @@ DISCLAIMER: All Cobigen plugins are compatible with the latest release of Devonf
 * CobiGen - Text Merger v7.1.0
 * CobiGen - JSON Plug-in v7.0.0
 * CobiGen - HTML Plug-in v7.0.0
-* CobiGen - Open API Plug-in v7.0.0
+* CobiGen - Open API Plug-in v7.1.0
 * CobiGen - FreeMaker Template Engine v7.0.0
 * CobiGen - Velocity Template Engine v7.0.0