diff --git a/README.md b/README.md
index f8c8d3e..45bd387 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ An [OML](https://github.com/opencaesar/oml) adapter for [OWL2-DL](https://www.w3
 ```
       
 ## Build
-Requirements: JDK 8
+Requirements: JDK 17+
 ```
     ./gradlew build
 ```
diff --git a/build.gradle b/build.gradle
index a83180d..e269ccf 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 subprojects {
 	group = 'io.opencaesar.adapters'
-	version = '2.7.0'
+	version = '2.7.1'
 	
 	ext.versions = [
 	    oml: '2.+',
diff --git a/oml2owl-gradle/.classpath b/oml2owl-gradle/.classpath
index e16509f..ea7f567 100755
--- a/oml2owl-gradle/.classpath
+++ b/oml2owl-gradle/.classpath
@@ -6,7 +6,7 @@
 			<attribute name="gradle_used_by_scope" value="main,test"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11/"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17/"/>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
 	<classpathentry kind="output" path="bin/default"/>
 </classpath>
diff --git a/oml2owl-gradle/.settings/org.eclipse.jdt.core.prefs b/oml2owl-gradle/.settings/org.eclipse.jdt.core.prefs
index 7adc0fb..d4540a5 100644
--- a/oml2owl-gradle/.settings/org.eclipse.jdt.core.prefs
+++ b/oml2owl-gradle/.settings/org.eclipse.jdt.core.prefs
@@ -1,10 +1,10 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
-org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.compliance=17
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=11
+org.eclipse.jdt.core.compiler.source=17
diff --git a/oml2owl/.classpath b/oml2owl/.classpath
index e16509f..ea7f567 100644
--- a/oml2owl/.classpath
+++ b/oml2owl/.classpath
@@ -6,7 +6,7 @@
 			<attribute name="gradle_used_by_scope" value="main,test"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11/"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17/"/>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
 	<classpathentry kind="output" path="bin/default"/>
 </classpath>
diff --git a/oml2owl/.settings/org.eclipse.jdt.core.prefs b/oml2owl/.settings/org.eclipse.jdt.core.prefs
index 7adc0fb..d4540a5 100644
--- a/oml2owl/.settings/org.eclipse.jdt.core.prefs
+++ b/oml2owl/.settings/org.eclipse.jdt.core.prefs
@@ -1,10 +1,10 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
-org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.compliance=17
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=11
+org.eclipse.jdt.core.compiler.source=17
diff --git a/owl2oml-gradle/.classpath b/owl2oml-gradle/.classpath
index e16509f..ea7f567 100755
--- a/owl2oml-gradle/.classpath
+++ b/owl2oml-gradle/.classpath
@@ -6,7 +6,7 @@
 			<attribute name="gradle_used_by_scope" value="main,test"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11/"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17/"/>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
 	<classpathentry kind="output" path="bin/default"/>
 </classpath>
diff --git a/owl2oml-gradle/.settings/org.eclipse.jdt.core.prefs b/owl2oml-gradle/.settings/org.eclipse.jdt.core.prefs
index 7adc0fb..d4540a5 100644
--- a/owl2oml-gradle/.settings/org.eclipse.jdt.core.prefs
+++ b/owl2oml-gradle/.settings/org.eclipse.jdt.core.prefs
@@ -1,10 +1,10 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
-org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.compliance=17
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=11
+org.eclipse.jdt.core.compiler.source=17
diff --git a/owl2oml/.classpath b/owl2oml/.classpath
index e16509f..ea7f567 100644
--- a/owl2oml/.classpath
+++ b/owl2oml/.classpath
@@ -6,7 +6,7 @@
 			<attribute name="gradle_used_by_scope" value="main,test"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11/"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17/"/>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
 	<classpathentry kind="output" path="bin/default"/>
 </classpath>
diff --git a/owl2oml/.settings/org.eclipse.jdt.core.prefs b/owl2oml/.settings/org.eclipse.jdt.core.prefs
index 7adc0fb..d4540a5 100644
--- a/owl2oml/.settings/org.eclipse.jdt.core.prefs
+++ b/owl2oml/.settings/org.eclipse.jdt.core.prefs
@@ -1,10 +1,10 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
-org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.compliance=17
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=11
+org.eclipse.jdt.core.compiler.source=17