diff --git a/README.md b/README.md
index ca5261d..a7d1d24 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 ##### This project is complete for now.
 [![Build Status](https://travis-ci.com/Pierce01/MinecraftLauncher-core.svg?branch=master)](https://travis-ci.com/Pierce01/MinecraftLauncher-core)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
-![version](https://img.shields.io/badge/stable_version-3.11.5-blue)
+![version](https://img.shields.io/badge/stable_version-3.12.0-blue)
 ![badge](https://img.shields.io/badge/ncurses-not_supported-purple)
 
 MCLC (Minecraft Launcher Core) is a NodeJS solution for launching modded and vanilla Minecraft without having to download and format everything yourself.
diff --git a/components/launcher.js b/components/launcher.js
index 44dc29e..7e14dc6 100644
--- a/components/launcher.js
+++ b/components/launcher.js
@@ -107,8 +107,8 @@ class MCLCore extends EventEmitter {
         } else {
             const file = custom || versionFile;
             // So mods like fabric work.
-            const jar = fs.existsSync(mcPath) ? `${mcPath}${separator}` : `${path.join(directory, `${this.options.version.number}.jar`)}${separator}`;
-            classPaths.push(`${jar}${classes.join(separator)}`);
+            const jar = fs.existsSync(mcPath) ? `${separator}${mcPath}` : `${separator}${path.join(directory, `${this.options.version.number}.jar`)}`;
+            classPaths.push(`${classes.join(separator)}${jar}`);
             classPaths.push(file.mainClass);
         }
 
diff --git a/package.json b/package.json
index cb92877..9bd5f8d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "minecraft-launcher-core",
-  "version": "3.11.6",
+  "version": "3.12.0",
   "description": "Lightweight module that downloads and runs Minecraft using javascript / NodeJS",
   "main": "index.js",
   "dependencies": {