diff --git a/build.gradle b/build.gradle
index 4fbc79f..ebe9aad 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,8 +1,11 @@
 plugins {
-	id 'fabric-loom' version '1.7-SNAPSHOT'
+	id 'fabric-loom' version '1.9-SNAPSHOT'
 	id 'maven-publish'
+	id 'org.jetbrains.kotlin.jvm' version "$kotlin_version"
 }
 
+kotlin_version = project.kotlin_version
+fabric_kt_version = project.fabric_kt_version
 version = project.mod_version
 group = project.maven_group
 
@@ -15,6 +18,11 @@ repositories {
 		name = "meteor-maven"
 		url = "https://maven.meteordev.org/releases"
 	}
+	maven {
+		name = "fabricmc-maven"
+		url = "https://maven.fabricmc.net/"
+	}
+	mavenCentral()
 }
 
 dependencies {
@@ -27,6 +35,8 @@ dependencies {
 	implementation "meteordevelopment:orbit:${project.orbit_version}"
 
 	implementation "org.reflections:reflections:${project.reflections_version}"
+	modImplementation "net.fabricmc:fabric-language-kotlin:$fabric_kt_version+kotlin.$kotlin_version"
+	implementation "org.jetbrains.kotlin:kotlin-metadata-jvm:$kotlin_version"
 }
 
 processResources {
@@ -34,6 +44,7 @@ processResources {
 
 	filesMatching("fabric.mod.json") {
 		expand "version": project.version
+		expand "kotlin_version": kotlin_version
 	}
 }
 
@@ -47,8 +58,6 @@ java {
 	// If you remove this line, sources will not be generated.
 	withSourcesJar()
 
-	sourceCompatibility = JavaVersion.VERSION_21
-	targetCompatibility = JavaVersion.VERSION_21
 }
 
 jar {
@@ -73,4 +82,7 @@ publishing {
 		// The repositories here will be used for publishing your artifact, not for
 		// retrieving dependencies.
 	}
+}
+kotlin {
+	jvmToolchain(21)
 }
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
index 1f77a01..c29b164 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -16,4 +16,6 @@
 # Dependencies
     fabric_version=0.42.0+1.16
     orbit_version=0.2.4
-    reflections_version=0.10.2
\ No newline at end of file
+    reflections_version=0.10.2
+    kotlin_version=2.1.0
+    fabric_kt_version=1.13.0
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a441313..cea7a79 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/settings.gradle b/settings.gradle
index 75c4d72..6d7da39 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -7,4 +7,9 @@ pluginManagement {
 		mavenCentral()
 		gradlePluginPortal()
 	}
+    plugins {
+        id 'org.jetbrains.kotlin.jvm' version '2.1.0'
+    }
+}
+plugins {
 }
\ No newline at end of file
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
index 863c05e..60cbde4 100644
--- a/src/main/resources/fabric.mod.json
+++ b/src/main/resources/fabric.mod.json
@@ -1,34 +1,38 @@
 {
-	"schemaVersion": 1,
-	"id": "opensigma",
-	"version": "${version}",
-	"name": "opensigma",
-	"description": "This is an example description! Tell everyone what your mod is about!",
-	"authors": [
-		"Me!"
-	],
-	"contact": {
-		"homepage": "https://fabricmc.net/",
-		"sources": "https://github.com/FabricMC/fabric-example-mod"
-	},
-	"license": "MIT",
-	"icon": "assets/opensigma/icon.png",
-	"environment": "*",
-	"entrypoints": {
-		"main": [
-          "info.opensigma.OpenSigma"
-		]
-	},
-	"mixins": [
-		"opensigma.mixins.json"
-	],
-	"depends": {
-		"fabricloader": ">=0.15.11",
-		"minecraft": "~1.16.4",
-		"java": ">=8",
-		"fabric": "*"
-	},
-	"suggests": {
-		"another-mod": "*"
-	}
+  "schemaVersion": 1,
+  "id": "opensigma",
+  "version": "${version}",
+  "name": "opensigma",
+  "description": "This is an example description! Tell everyone what your mod is about!",
+  "authors": [
+    "Me!"
+  ],
+  "contact": {
+    "homepage": "https://fabricmc.net/",
+    "sources": "https://github.com/FabricMC/fabric-example-mod"
+  },
+  "license": "MIT",
+  "icon": "assets/opensigma/icon.png",
+  "environment": "*",
+  "entrypoints": {
+    "main": [
+      {
+        "adapter": "kotlin",
+        "value": "info.opensigma.OpenSigma"
+      }
+    ]
+  },
+  "mixins": [
+    "opensigma.mixins.json"
+  ],
+  "depends": {
+    "fabricloader": ">=0.15.11",
+    "fabric-language-kotlin": ">=1.13.0+kotlin.${kotlin_version}",
+    "minecraft": "~1.16.4",
+    "java": ">=8",
+    "fabric": "*"
+  },
+  "suggests": {
+    "another-mod": "*"
+  }
 }
\ No newline at end of file