diff --git a/.project b/.project
new file mode 100644
index 0000000..a09e9ec
--- /dev/null
+++ b/.project
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>knip-tess4j</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+	</natures>
+</projectDescription>
\ No newline at end of file
diff --git a/org.knime.knip.tess4j.base/.classpath b/org.knime.knip.tess4j.base/.classpath
index 6195f65..9a31951 100644
--- a/org.knime.knip.tess4j.base/.classpath
+++ b/org.knime.knip.tess4j.base/.classpath
@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry exported="true" kind="lib" path="lib/jna.jar"/>
diff --git a/org.knime.knip.tess4j.base/.settings/org.eclipse.jdt.core.prefs b/org.knime.knip.tess4j.base/.settings/org.eclipse.jdt.core.prefs
index 3a21537..92dd3c2 100644
--- a/org.knime.knip.tess4j.base/.settings/org.eclipse.jdt.core.prefs
+++ b/org.knime.knip.tess4j.base/.settings/org.eclipse.jdt.core.prefs
@@ -1,11 +1,14 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.compliance=21
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
 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.source=1.8
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=21
diff --git a/org.knime.knip.tess4j.base/META-INF/MANIFEST.MF b/org.knime.knip.tess4j.base/META-INF/MANIFEST.MF
index 850be35..e4babd0 100644
--- a/org.knime.knip.tess4j.base/META-INF/MANIFEST.MF
+++ b/org.knime.knip.tess4j.base/META-INF/MANIFEST.MF
@@ -14,7 +14,7 @@ Require-Bundle: org.knime.base;bundle-version="[3.0.0,6.0.0)",
  imglib2;bundle-version="5.3.0",
  imagej-common;bundle-version="0.26.1",
  scijava-common;bundle-version="2.74.2"
-Bundle-RequiredExecutionEnvironment: JavaSE-1.8
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Bundle-ClassPath: knip_ocr.jar,
  lib/jna.jar,
  lib/tess4j-lw-3.0.0-SNAPSHOT.jar,
diff --git a/org.knime.knip.tess4j.bin.linux.amd64/META-INF/MANIFEST.MF b/org.knime.knip.tess4j.bin.linux.amd64/META-INF/MANIFEST.MF
index 5f11ca8..6aa7779 100644
--- a/org.knime.knip.tess4j.bin.linux.amd64/META-INF/MANIFEST.MF
+++ b/org.knime.knip.tess4j.bin.linux.amd64/META-INF/MANIFEST.MF
@@ -11,4 +11,4 @@ Bundle-NativeCode:
  lib/linux/amd64/liblept.so;
  osname=Linux;
  processor=x86_64
-Bundle-RequiredExecutionEnvironment: JavaSE-1.8
+Bundle-RequiredExecutionEnvironment: JavaSE-21
diff --git a/org.knime.knip.tess4j.bin.macosx.amd64/META-INF/MANIFEST.MF b/org.knime.knip.tess4j.bin.macosx.amd64/META-INF/MANIFEST.MF
index b5c9404..fa400bb 100644
--- a/org.knime.knip.tess4j.bin.macosx.amd64/META-INF/MANIFEST.MF
+++ b/org.knime.knip.tess4j.bin.macosx.amd64/META-INF/MANIFEST.MF
@@ -5,7 +5,7 @@ Bundle-SymbolicName: org.knime.knip.tess4j.bin.macosx.amd64
 Bundle-Version: 1.3.3.qualifier
 Bundle-Vendor: University of Konstanz
 Fragment-Host: org.knime.knip.tess4j.base;bundle-version="1.3.3.qualifier"
-Bundle-RequiredExecutionEnvironment: JavaSE-1.7
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Eclipse-PlatformFilter: (&(osgi.os=macosx)(osgi.arch=x86_64))
 Bundle-NativeCode: 
  lib/macosx/amd64/liblept.4.dylib;
diff --git a/org.knime.knip.tess4j.bin.windows.amd64/META-INF/MANIFEST.MF b/org.knime.knip.tess4j.bin.windows.amd64/META-INF/MANIFEST.MF
index 02465b5..4a6230c 100644
--- a/org.knime.knip.tess4j.bin.windows.amd64/META-INF/MANIFEST.MF
+++ b/org.knime.knip.tess4j.bin.windows.amd64/META-INF/MANIFEST.MF
@@ -5,7 +5,7 @@ Bundle-SymbolicName: org.knime.knip.tess4j.bin.windows.amd64
 Bundle-Version: 1.3.3.qualifier
 Bundle-Vendor: University of Konstanz
 Fragment-Host: org.knime.knip.tess4j.base;bundle-version="1.3.3.qualifier"
-Bundle-RequiredExecutionEnvironment: JavaSE-1.7
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Eclipse-PlatformFilter: (&(osgi.os=win32)(osgi.arch=x86_64))
 Bundle-NativeCode: 
  lib/windows/amd64/libwinpthread-1.dll;
diff --git a/pom.xml b/pom.xml
index 22bcf15..2c7d114 100644
--- a/pom.xml
+++ b/pom.xml
@@ -12,11 +12,14 @@
 	<properties>
 		<revision>1.0.0</revision>
 		<changelist>-SNAPSHOT</changelist>
-		<knime.version>5.1</knime.version>
-		<tycho.version>2.7.5</tycho.version>
+		<knime.version>nightly</knime.version>
+		<tycho.version>4.0.13</tycho.version>
 		<tycho.extras.version>${tycho.version}</tycho.extras.version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+		<maven.compiler.source>21</maven.compiler.source>
+		<maven.compiler.target>21</maven.compiler.target>
+		<maven.compiler.release>21</maven.compiler.release>		
 	</properties>
 
 	<!-- List the modules of your project here -->
@@ -85,7 +88,7 @@
 					</configuration>
 				</plugin>
 				<plugin>
-					<groupId>org.eclipse.tycho.extras</groupId>
+					<groupId>org.eclipse.tycho</groupId>
 					<artifactId>tycho-buildtimestamp-jgit</artifactId>
 					<version>${tycho.extras.version}</version>
 				</plugin>
@@ -136,14 +139,14 @@
 
 				<!-- This plugin configuration block is only needed if the repository contains plug-ins that don't have any sources. If it is omitted
 		 		Tycho will complain. -->
-				<groupId>org.eclipse.tycho.extras</groupId>
-				<artifactId>tycho-source-feature-plugin</artifactId>
+				<groupId>org.eclipse.tycho</groupId>
+				<artifactId>tycho-source-plugin</artifactId>
 				<executions>
 					<execution>
-						<id>source-feature</id>
+						<id>feature-source</id>
 						<phase>package</phase>
 						<goals>
-							<goal>source-feature</goal>
+							<goal>feature-source</goal>
 						</goals>
 					</execution>
 				</executions>
@@ -166,7 +169,7 @@
 				<artifactId>tycho-packaging-plugin</artifactId>
 				<dependencies>
 					<dependency>
-						<groupId>org.eclipse.tycho.extras</groupId>
+						<groupId>org.eclipse.tycho</groupId>
 						<artifactId>tycho-buildtimestamp-jgit</artifactId>
 						<version>${tycho.extras.version}</version>
 					</dependency>