diff --git a/antlr/build.gradle b/antlr/build.gradle
new file mode 100644
index 0000000..5cc4a3d
--- /dev/null
+++ b/antlr/build.gradle
@@ -0,0 +1,19 @@
+plugins {
+    id 'antlr'
+}
+
+dependencies {
+    implementation rootProject
+
+    testImplementation group: "net.woggioni", name: "jwo", version: getProperty('version.jwo')
+    testImplementation project(':test-utils')
+    testImplementation group: "com.fasterxml.jackson.core", name:"jackson-databind", version: getProperty('version.jackson')
+    testImplementation group: "org.tukaani", name: "xz", version: getProperty('version.xz')
+    antlr group: "org.antlr", name: "antlr4", version: getProperty('version.antlr')
+    antlr group: "org.antlr", name: "antlr4-runtime", version: getProperty('version.antlr')
+}
+
+generateGrammarSource {
+    maxHeapSize = "64m"
+    arguments += ['-package', 'net.woggioni.wson.antlr']
+}
diff --git a/antlr/src/main/antlr4/JSON.g4 b/antlr/src/main/antlr/net/woggioni/wson/antlr/JSON.g4
similarity index 100%
rename from antlr/src/main/antlr4/JSON.g4
rename to antlr/src/main/antlr/net/woggioni/wson/antlr/JSON.g4
diff --git a/antlr/src/test/java/net/woggioni/wson/serialization/json/PerformanceTest.java b/antlr/src/test/java/net/woggioni/wson/serialization/json/PerformanceTest.java
index 671d72b..38c1025 100644
--- a/antlr/src/test/java/net/woggioni/wson/serialization/json/PerformanceTest.java
+++ b/antlr/src/test/java/net/woggioni/wson/serialization/json/PerformanceTest.java
@@ -55,7 +55,7 @@ public class PerformanceTest {
     @Test
     @SneakyThrows
     public void loopTest() {
-        double jacksonTime, worthTime, antlrTime;
+        double jacksonTime, wsonTime, antlrTime;
         final int loops = 100;
         Chronometer chr = new Chronometer();
         {
@@ -76,8 +76,8 @@ public class PerformanceTest {
                     Value value = new JSONParser().parse(smallTestData());
                 }
             }
-            worthTime = chr.elapsed(Chronometer.UnitOfMeasure.MILLISECONDS);
-            System.out.printf("Worth time:   %8s msec\n", String.format("%.3f", worthTime));
+            wsonTime = chr.elapsed(Chronometer.UnitOfMeasure.MILLISECONDS);
+            System.out.printf("Worth time:   %8s msec\n", String.format("%.3f", wsonTime));
         }
         {
             for(int j = 0; j < 2; j++) {
diff --git a/benchmark/build.gradle b/benchmark/build.gradle
new file mode 100644
index 0000000..8970f02
--- /dev/null
+++ b/benchmark/build.gradle
@@ -0,0 +1,23 @@
+plugins {
+    id 'application'
+}
+
+application {
+    mainClassName = 'net.woggioni.wson.benchmark.Main'
+    applicationDefaultJvmArgs = ['-Xmx8G']
+}
+
+run {
+    commandLine
+}
+
+dependencies {
+    implementation rootProject
+    implementation project(':antlr')
+    implementation group: "net.woggioni", name: "jwo", version: getProperty('version.jwo')
+    implementation group: 'org.tukaani', name: 'xz', version: getProperty('version.xz')
+    implementation group: 'com.beust', name: 'jcommander', version: getProperty('version.jcommander')
+    implementation group: "com.fasterxml.jackson.core", name:  "jackson-databind", version: getProperty('version.jackson')
+
+    runtimeOnly project(':test-utils')
+}
diff --git a/benchmark/build.sbt b/benchmark/build.sbt
deleted file mode 100644
index 5864845..0000000
--- a/benchmark/build.sbt
+++ /dev/null
@@ -1,13 +0,0 @@
-organization := (organization in LocalRootProject).value
-name := "worth-benchmark"
-version := (version in LocalRootProject).value
-resourceDirectory in Compile := (resourceDirectory in(LocalRootProject, Test)).value
-skip in publish := true
-maintainer := "oggioni.walter@gmail.com"
-mainClass := Some("net.woggioni.worth.benchmark.Main")
-javaOptions in Universal += "-J-Xmx4G"
-fork := true
-libraryDependencies += "com.fasterxml.jackson.core" % "jackson-databind" % Versions.jackson
-libraryDependencies += "org.tukaani" % "xz" % Versions.xz
-libraryDependencies += "com.beust" % "jcommander" % Versions.jcommander
-libraryDependencies += "org.projectlombok" % "lombok" % Versions.lombok % Provided
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..7a52e30
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,79 @@
+plugins {
+    id 'maven-publish'
+}
+
+allprojects {
+    apply plugin: 'java-library'
+    group = "net.woggioni"
+    version = getProperty('version.wson')
+
+    repositories {
+        maven {
+            url = "https://woggioni.net/mvn/"
+        }
+        mavenCentral()
+    }
+
+    dependencies {
+        ['', 'test'].each {sourceSetName ->
+            ['compileOnly', 'annotationProcessor'].each { configurationSuffix ->
+                String configurationName
+                if(sourceSetName) configurationName = sourceSetName + configurationSuffix.capitalize()
+                else configurationName = configurationSuffix
+                add(configurationName,  [group: "org.projectlombok", name: "lombok", version: getProperty('version.lombok')])
+            }
+        }
+        testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: getProperty('version.junit.jupiter')
+        testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-params', version: getProperty('version.junit.jupiter')
+        testRuntimeOnly group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: getProperty('version.junit.jupiter')
+    }
+
+    test {
+        useJUnitPlatform()
+    }
+}
+
+subprojects {
+    tasks.named('jar', Jar) {
+        archiveBaseName = "wson-${project.name}"
+    }
+}
+
+dependencies {
+    implementation group: "net.woggioni", name: "jwo", version: getProperty('version.jwo')
+    implementation group: "org.slf4j", name: "slf4j-api", version: getProperty('version.slf4j')
+
+    testImplementation project('test-utils')
+    testImplementation group: "com.fasterxml.jackson.core", name:  "jackson-databind", version: getProperty('version.jackson')
+}
+
+compileJava {
+    options.release = 8
+}
+
+jar {
+    manifest{
+        attributes([
+            "Automatic-Module-Name": "net.woggioni.wson"
+        ])
+    }
+}
+
+wrapper {
+    distributionType = Wrapper.DistributionType.BIN
+    gradleVersion = "7.0.2"
+}
+
+
+publishing {
+    repositories {
+        maven {
+            url = "https://mvn.woggioni.net/"
+        }
+    }
+    publications {
+        maven(MavenPublication) {
+            from(components["java"])
+        }
+    }
+}
diff --git a/build.sbt b/build.sbt
deleted file mode 100644
index 4858aa2..0000000
--- a/build.sbt
+++ /dev/null
@@ -1,66 +0,0 @@
-import sbt.Keys.libraryDependencies
-
-name := "wson"
-
-organization := "net.woggioni"
-
-maintainer := "oggioni.walter@gmail.com"
-
-version := "1.0"
-resolvers += Resolver.mavenLocal
-
-crossPaths := false
-
-autoScalaLibrary := false
-
-scalacOptions ++= Seq(
-    "-unchecked",
-    "-deprecation",
-    "-language:_",
-    "-opt:l:inline", "-opt-inline-from",
-    "-target:jvm-1.8",
-    "-encoding", "UTF-8"
-)
-
-git.useGitDescribe := true
-//javaOptions in Test += "-Xmx14G"
-javacOptions in (Compile, compile) ++= Seq("--release", "8")
-//scalafmtOnCompile := true
-libraryDependencies += "org.projectlombok" % "lombok" % Versions.lombok % Provided
-libraryDependencies += "net.woggioni" % "jwo" % "1.0" % Compile
-
-Compile / packageBin / packageOptions +=
-  Package.ManifestAttributes("Automatic-Module-Name" -> "net.woggioni.wson")
-
-libraryDependencies += "net.aichler" % "jupiter-interface" % JupiterKeys.jupiterVersion.value % Test
-libraryDependencies += "org.junit.jupiter" % "junit-jupiter-params" % JupiterKeys.junitJupiterVersion.value % Test
-libraryDependencies += "com.fasterxml.jackson.core" % "jackson-databind" % Versions.jackson % Test
-libraryDependencies += "org.tukaani" % "xz" % Versions.xz % Test
-
-enablePlugins(Delombok)
-enablePlugins(DelombokJavadoc)
-enablePlugins(JupiterPlugin)
-
-testOptions += Tests.Argument(jupiterTestFramework, "-q", "-a")
-
-lazy val testUtils = (project in file("test-utils"))
-
-dependsOn(testUtils % "test")
-
-lazy val worthAntlr = (project in file("antlr"))
-  .dependsOn(LocalRootProject)
-  .dependsOn(testUtils % "test")
-  .enablePlugins(Antlr4Plugin)
-
-lazy val cli = (project in file("cli"))
-  .dependsOn(LocalRootProject)
-  .enablePlugins(JavaAppPackaging)
-  .enablePlugins(UniversalPlugin)
-  .enablePlugins(JlinkPlugin)
-
-lazy val benchmark = (project in file("benchmark"))
-  .dependsOn(LocalRootProject)
-  .dependsOn(worthAntlr)
-  .dependsOn(testUtils)
-  .enablePlugins(JavaAppPackaging)
-  .enablePlugins(UniversalPlugin)
diff --git a/cli/build.gradle b/cli/build.gradle
new file mode 100644
index 0000000..a5b8cbc
--- /dev/null
+++ b/cli/build.gradle
@@ -0,0 +1,15 @@
+plugins {
+    id 'application'
+    id 'org.jetbrains.kotlin.jvm'
+}
+
+dependencies {
+    implementation group: 'org.jetbrains.kotlin', name: 'kotlin-stdlib', version: getProperty('version.kotlin')
+    implementation group: 'com.beust', name: 'jcommander', version: getProperty('version.jcommander')
+    implementation group: "org.slf4j", name: "slf4j-simple", version: getProperty('version.slf4j')
+    implementation rootProject
+}
+
+application {
+    mainClassName = 'net.woggioni.wson.cli.MainKt'
+}
diff --git a/cli/build.sbt b/cli/build.sbt
deleted file mode 100644
index 431107e..0000000
--- a/cli/build.sbt
+++ /dev/null
@@ -1,8 +0,0 @@
-organization := (organization in LocalRootProject).value
-name := "worth-cli"
-version := (version in LocalRootProject).value
-resourceDirectory := (resourceDirectory in(LocalRootProject, Test)).value
-skip in publish := true
-mainClass := Some("net.woggioni.worth.cli.Main")
-maintainer := "oggioni.walter@gmail.com"
-libraryDependencies += "com.beust" % "jcommander" % Versions.jcommander
diff --git a/cli/src/main/kotlin/net/woggioni/wson/cli/main.kt b/cli/src/main/kotlin/net/woggioni/wson/cli/main.kt
new file mode 100644
index 0000000..99fa8fb
--- /dev/null
+++ b/cli/src/main/kotlin/net/woggioni/wson/cli/main.kt
@@ -0,0 +1,128 @@
+package net.woggioni.wson.cli
+
+import com.beust.jcommander.IStringConverter
+import com.beust.jcommander.JCommander
+import com.beust.jcommander.Parameter
+import com.beust.jcommander.ParameterException
+import com.beust.jcommander.converters.PathConverter
+import kotlin.system.exitProcess
+import net.woggioni.wson.serialization.binary.JBONDumper
+import net.woggioni.wson.serialization.binary.JBONParser
+import net.woggioni.wson.serialization.json.JSONDumper
+import net.woggioni.wson.serialization.json.JSONParser
+import net.woggioni.wson.xface.Value
+import java.io.BufferedInputStream
+import java.io.BufferedOutputStream
+import java.io.InputStreamReader
+import java.io.OutputStreamWriter
+import java.nio.file.Files
+import java.nio.file.Path
+
+
+sealed class SerializationFormat(val name: String) {
+    override fun toString() = name
+
+    object JSON : SerializationFormat("json")
+    object JBON : SerializationFormat("jbon")
+
+    companion object {
+        fun parse(value: String) = when (value) {
+            JBON.name -> JBON
+            JSON.name -> JSON
+            else -> {
+                val availableValues = sequenceOf(
+                        JSON,
+                        JBON
+                ).map(SerializationFormat::name).joinToString(", ")
+                throw IllegalArgumentException(
+                        "Unknown serialization format '$value', possible values are $availableValues")
+            }
+        }
+    }
+}
+
+private class OutputTypeConverter : IStringConverter<SerializationFormat> {
+    override fun convert(value: String): SerializationFormat = SerializationFormat.parse(value)
+}
+
+private class CliArg {
+
+    @Parameter(names = ["-f", "--file"], description = "Name of the input file to parse", converter = PathConverter::class)
+    var fileName: Path? = null
+
+    @Parameter(names = ["--input-type"], description = "Input type", converter = OutputTypeConverter::class)
+    var inputType: SerializationFormat = SerializationFormat.JSON
+
+    @Parameter(names = ["-o", "--output"], description = "Name of the JSON file to generate", converter = PathConverter::class)
+    var output: Path? = null
+
+    @Parameter(names = ["-t", "--type"], description = "Output type", converter = OutputTypeConverter::class)
+    var outputType: SerializationFormat = SerializationFormat.JSON
+
+    @Parameter(names = ["-h", "--help"], help = true)
+    var help: Boolean = false
+}
+
+fun main(vararg args: String) {
+    val cliArg = CliArg()
+    val cliArgumentParser = JCommander.newBuilder()
+            .addObject(cliArg)
+            .build()
+    try {
+        cliArgumentParser.parse(*args)
+    } catch (pe: ParameterException) {
+        cliArgumentParser.usage()
+        exitProcess(-1)
+    }
+    if (cliArg.help) {
+        cliArgumentParser.usage()
+        exitProcess(0)
+    }
+    val cfg = Value.Configuration.builder().serializeReferences(true).build()
+    val inputStream = if (cliArg.fileName != null) {
+        BufferedInputStream(Files.newInputStream(cliArg.fileName))
+    } else {
+        System.`in`
+    }
+
+    val result = when(cliArg.inputType) {
+        SerializationFormat.JSON -> {
+            val reader = InputStreamReader(inputStream)
+            try {
+                JSONParser(cfg).parse(reader)
+            } finally {
+                reader.close()
+            }
+        }
+        SerializationFormat.JBON -> {
+            try {
+                JBONParser(cfg).parse(inputStream)
+            } finally {
+                inputStream.close()
+            }
+        }
+    }
+
+    val outputStream = if (cliArg.output != null) {
+        BufferedOutputStream(Files.newOutputStream(cliArg.output))
+    } else {
+        System.out
+    }
+    when(cliArg.outputType) {
+        SerializationFormat.JSON -> {
+            val writer = OutputStreamWriter(outputStream)
+            try {
+                JSONDumper(cfg).dump(result, writer)
+            } finally {
+                writer.close()
+            }
+        }
+        SerializationFormat.JBON -> {
+            try {
+                JBONDumper(cfg).dump(result, outputStream)
+            } finally {
+                outputStream.close()
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/cli/src/main/scala/net/woggioni/wson/cli/Main.scala b/cli/src/main/scala/net/woggioni/wson/cli/Main.scala
deleted file mode 100644
index 1aa0450..0000000
--- a/cli/src/main/scala/net/woggioni/wson/cli/Main.scala
+++ /dev/null
@@ -1,126 +0,0 @@
-package net.woggioni.wson.cli
-
-import java.io._
-
-import com.beust.jcommander.{IStringConverter, JCommander, Parameter, ParameterException}
-import net.woggioni.wson.serialization.binary.{JBONDumper, JBONParser}
-import net.woggioni.wson.serialization.json.{JSONDumper, JSONParser}
-import net.woggioni.wson.xface.Value
-
-sealed abstract class SerializationFormat(val name : String) {
-    override def toString = name
-}
-
-object SerializationFormat {
-    case object JSON extends SerializationFormat("json")
-    case object JBON extends SerializationFormat("jbon")
-
-    def parse(value : String) : SerializationFormat = {
-        value match {
-            case JBON.name => JBON
-            case JSON.name => JSON
-            case _ => {
-                val arr = Stream(
-                    SerializationFormat.JSON,
-                    SerializationFormat.JBON
-                ).map(_.name).toArray
-                val availableValues = String.join(", ", arr :_*)
-                throw new IllegalArgumentException(
-                    s"Unknown serialization format '$value', possible values are $availableValues")
-            }
-        }
-    }
-}
-
-class OutputTypeConverter extends IStringConverter[SerializationFormat] {
-    override def convert(value: String): SerializationFormat = SerializationFormat.parse(value)
-}
-
-class CliArg {
-
-    @Parameter(names = Array("-f", "--file"), description = "Name of the .cz file to parse")
-    var fileName : String = _
-
-    @Parameter(names = Array("--input-type"), description = "Input type", converter = classOf[OutputTypeConverter])
-    var inputType : SerializationFormat = SerializationFormat.JSON
-
-    @Parameter(names = Array("-o", "--output"), description = "Name of the JSON file to generate")
-    var outPut : String = _
-
-    @Parameter(names = Array("-t", "--type"), description = "Output type", converter = classOf[OutputTypeConverter])
-    var outputType : SerializationFormat = SerializationFormat.JSON
-
-    @Parameter(names = Array("-h", "--help"), help = true)
-    var help : Boolean = _
-}
-
-
-object Main {
-
-    def main(argv : Array[String]): Unit = {
-        val cliArg = new CliArg
-        val cliArgumentParser = JCommander.newBuilder()
-            .addObject(cliArg)
-            .build()
-        try {
-            cliArgumentParser.parse(argv :_*)
-        } catch {
-            case _ : ParameterException => {
-                cliArgumentParser.usage()
-                System.exit(-1)
-            }
-            case e : Throwable => throw e
-        }
-        if(cliArg.help) {
-            cliArgumentParser.usage()
-            System.exit(0)
-        }
-        val cfg = Value.Configuration.builder().serializeReferences(true).build()
-        val inputStream = if(cliArg.fileName != null) {
-            new BufferedInputStream(new FileInputStream(cliArg.fileName))
-        } else {
-            System.in
-        }
-
-        val result = cliArg.inputType match {
-            case SerializationFormat.JSON => {
-                val reader = new InputStreamReader(inputStream)
-                try {
-                    new JSONParser(cfg).parse(reader)
-                } finally {
-                    reader.close()
-                }
-            }
-            case SerializationFormat.JBON => {
-                try {
-                    new JBONParser(cfg).parse(inputStream)
-                } finally {
-                    inputStream.close()
-                }
-            }
-        }
-
-        val outputStream = if(cliArg.outPut != null) {
-            new BufferedOutputStream(new FileOutputStream(cliArg.outPut))
-        } else {
-            System.out
-        }
-        cliArg.outputType match {
-            case SerializationFormat.JSON => {
-                val writer = new OutputStreamWriter(outputStream)
-                try {
-                    new JSONDumper(cfg).dump(result, writer)
-                } finally {
-                    writer.close()
-                }
-            }
-            case SerializationFormat.JBON => {
-                try {
-                    new JBONDumper(cfg).dump(result, outputStream)
-                } finally {
-                    outputStream.close()
-                }
-            }
-        }
-    }
-}
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..e6dee09
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,10 @@
+version.wson = 1.0
+version.jwo = 1.0
+version.junit.jupiter = 5.7.0
+version.lombok = 1.18.16
+version.slf4j = 1.7.30
+version.jackson = 2.12.3
+version.jcommander = 1.81
+version.antlr = 4.9.2
+version.xz = 1.8
+version.kotlin=1.5.10
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..e708b1c
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..0f80bbf
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..4f906e0
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..ac1b06f
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/project/build.properties b/project/build.properties
deleted file mode 100644
index 08e4d79..0000000
--- a/project/build.properties
+++ /dev/null
@@ -1 +0,0 @@
-sbt.version=1.4.1
diff --git a/project/build.scala b/project/build.scala
deleted file mode 100644
index 7acafd7..0000000
--- a/project/build.scala
+++ /dev/null
@@ -1,11 +0,0 @@
-object Versions {
-  val slf4j = "1.7.30"
-  val log4j = "2.13.2"
-  val lombok = "1.18.16"
-  val junitJupiter = "5.6.2"
-  val junitPlatform = "1.6.2"
-  val jackson = "2.11.3"
-  val jcommander = "1.78"
-  val antlr = "4.7.2"
-  val xz = "1.8"
-}
\ No newline at end of file
diff --git a/project/plugins.sbt b/project/plugins.sbt
deleted file mode 100644
index b2275b2..0000000
--- a/project/plugins.sbt
+++ /dev/null
@@ -1,12 +0,0 @@
-//addSbtPlugin("com.earldouglas" % "xsbt-web-plugin" % "4.0.2")
-addSbtPlugin("com.dwijnand"      % "sbt-travisci" % "1.1.1")
-addSbtPlugin("com.jsuereth"      % "sbt-pgp"      % "1.1.0")
-addSbtPlugin("com.lucidchart" % "sbt-scalafmt" % "1.15")
-//addSbtPlugin("com.geirsson" % "sbt-scalafmt" % "1.5.1")
-addSbtPlugin("com.typesafe.sbt"  % "sbt-git"      % "0.9.3")
-addSbtPlugin("de.heikoseeberger" % "sbt-header"   % "4.1.0")
-addSbtPlugin("org.foundweekends" % "sbt-bintray" % "0.5.3")
-addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.7.6")
-addSbtPlugin("com.simplytyped" % "sbt-antlr4" % "0.8.1")
-addSbtPlugin("net.aichler" % "sbt-jupiter-interface" % "0.8.4-SNAPSHOT")
-addSbtPlugin("com.thoughtworks.sbt" % "delombokjavadoc" % "1.0.0+66-8fbcf18c")
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..05e269a
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,17 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+    }
+
+    plugins {
+        id 'org.jetbrains.kotlin.jvm' version getProperty('version.kotlin')
+    }
+}
+
+rootProject.name = 'wson'
+
+def includeDirs = ['antlr', 'benchmark', 'test-utils', 'cli']
+
+includeDirs.each {
+    include(it)
+}
diff --git a/test-utils/build.sbt b/test-utils/build.sbt
deleted file mode 100644
index 531bbac..0000000
--- a/test-utils/build.sbt
+++ /dev/null
@@ -1,4 +0,0 @@
-organization := (organization in LocalRootProject).value
-name := "test-utils"
-version := (version in LocalRootProject).value
-skip in publish := true