diff --git a/README.md b/README.md
index d3c3d7f..473435e 100644
--- a/README.md
+++ b/README.md
@@ -28,19 +28,20 @@ Calling `drenv` without any arguments will also display this message.
 ```
 Usage: drenv [options] [command]
 
-CLI to manage DragonRuby environments.
+CLI to manage DragonRuby environments
 
 Options:
   -V, --version     output the version number
   -h, --help        display help for command
 
 Commands:
-  setup             Setup your shell profile to use drenv.
-  new <name>        Create a new DragonRuby project.
-  register <path>   Register a DragonRuby installation. This moves the installation to the $HOME/.drenv directory.
-  global [version]  Get or set the global version of DragonRuby.
-  local [version]   Get or set the local version of DragonRuby.
-  versions          List out all locally installed versions of DragonRuby.
+  setup             Setup your shell profile to use drenv
+  new <name>        Create a new DragonRuby project
+  register <path>   Register a DragonRuby installation
+  global [version]  Get or set the global version of DragonRuby
+  local [version]   Get or set the local version of DragonRuby
+  versions          List out all locally installed versions of DragonRuby
+  upgrade           Upgrade the version of drenv
   help [command]    display help for command
 ```
 
@@ -60,11 +61,14 @@ into **drenv**'s home directory.
 > You will need to register at least one DragonRuby installation before you can
 > use **drenv**.
 
-### `drenv global <version>`
+### `drenv global [version]`
 
 This command sets the version of DragonRuby that **drenv** will use when
 creating new projects.
 
+If you call `drenv global` without any arguments, it will display the current
+global version.
+
 ### `drenv new <name>`
 
 This command will create a new DragonRuby project with the specified name.
@@ -81,13 +85,19 @@ Under the hood, all **drenv** does is copy the contents of the global DragonRuby
 installation into the current project directory, excluding the `mygame`
 directory.
 
+### `drenv upgrade`
+
+This command will download and upgrade your **drenv** installation to the latest
+version.
+
 ### `drenv versions`
 
 This command will list out all registered versions of DragonRuby.
 
 ```
   5.32
+  6.4
 * 6.3
 ```
 
-Tested on MacOS Macbook Pro M1 with DragonRuby 5.32 and 6.3.
+Tested on MacOS Macbook Pro M1 with DragonRuby 5.32, 6.3, and 6.4.
diff --git a/commands/upgrade.ts b/commands/upgrade.ts
new file mode 100644
index 0000000..9a8e602
--- /dev/null
+++ b/commands/upgrade.ts
@@ -0,0 +1,62 @@
+import { greaterThan, parse } from "jsr:@std/semver";
+
+import { program } from "../main.ts";
+import { drenvBinPath, version } from "../constants.ts";
+
+type Asset = {
+  url: string;
+  id: number;
+  node_id: string;
+  name: string;
+  label: string | null;
+  uploader: any;
+  content_type: string;
+  state: string;
+  size: number;
+  download_count: number;
+  created_at: string;
+  updated_at: string;
+  browser_download_url: string;
+};
+
+export default async function upgrade() {
+  console.log(`Current version is v${program.version()}`);
+  console.log("Checking for updates...");
+
+  const dataResponse = await fetch(
+    "https://api.github.com/repos/nitemaeric/drenv/releases/latest",
+  );
+  const data = await dataResponse.json();
+
+  const localVersion = parse(version);
+  const remoteVersion = parse(data.tag_name.slice(1));
+
+  if (greaterThan(remoteVersion, localVersion)) {
+    console.log(`New version found: ${data.tag_name}`);
+
+    const file = await Deno.open(drenvBinPath, { write: true, create: true });
+
+    const targetAsset = data.assets.find((asset: Asset) =>
+      asset.name.includes(Deno.build.target)
+    );
+
+    if (targetAsset) {
+      console.log(`Downloading new version...`);
+
+      const downloadResponse = await fetch(targetAsset.browser_download_url);
+
+      if (!downloadResponse.body) {
+        throw new Error("Could not download the new version");
+      }
+
+      await downloadResponse.body.pipeTo(file.writable);
+      await Deno.chmod(drenvBinPath, 0o755);
+
+      console.log(`Upgraded to ${data.tag_name}`);
+    } else {
+      console.log("No asset found for your platform");
+    }
+  } else {
+    console.log("Already up-to-date");
+  }
+}
diff --git a/constants.ts b/constants.ts
index e80e43c..aa3f020 100644
--- a/constants.ts
+++ b/constants.ts
@@ -1,4 +1,6 @@
+export const version = "0.3.0";
 export const homePath = `${Deno.env.get("HOME")}/.drenv`;
 export const versionsPath = `${homePath}/versions`;
 export const binPath = `${homePath}/bin`;
+export const drenvBinPath = `${binPath}/drenv`;
 export const shell = Deno.env.get("SHELL");
diff --git a/deno.lock b/deno.lock
index 8393e4d..7692c2a 100644
--- a/deno.lock
+++ b/deno.lock
@@ -6,6 +6,7 @@
     "jsr:@std/fs@^1.0.4": "1.0.4",
     "jsr:@std/internal@^1.0.4": "1.0.4",
     "jsr:@std/path@^1.0.6": "1.0.6",
+    "jsr:@std/semver@*": "1.0.3",
     "npm:commander@*": "12.1.0",
     "npm:commander@^12.1.0": "12.1.0"
   },
@@ -27,6 +28,9 @@
     },
     "@std/path@1.0.6": {
       "integrity": "ab2c55f902b380cf28e0eec501b4906e4c1960d13f00e11cfbcd21de15f18fed"
+    },
+    "@std/semver@1.0.3": {
+      "integrity": "7c139c6076a080eeaa4252c78b95ca5302818d7eafab0470d34cafd9930c13c8"
     }
   },
   "npm": {
diff --git a/main.ts b/main.ts
index f55659c..0ca4998 100644
--- a/main.ts
+++ b/main.ts
@@ -5,9 +5,12 @@ import local from "./commands/local.ts";
 import newCommand from "./commands/new.ts";
 import register from "./commands/register.ts";
 import setup from "./commands/setup.ts";
+import upgrade from "./commands/upgrade.ts";
 import versions from "./commands/versions.ts";
 
-const program = new Command();
+import { version } from "./constants.ts";
+
+export const program = new Command();
 
 const actionRunner = (fn: (...args: any[]) => Promise<any>) => {
   return (...args: any[]): any =>
@@ -24,20 +27,21 @@ const actionRunner = (fn: (...args: any[]) => Promise<any>) => {
 
 program
   .name("drenv")
-  .description("CLI to manage DragonRuby environments.")
-  .version("0.2.3");
+  .description("CLI to manage DragonRuby environments")
+  .version(version);
 
 program.command("setup")
-  .description("Setup your shell profile to use drenv.")
+  .description("Setup your shell profile to use drenv")
   .action(actionRunner(setup));
 
 program.command("new")
   .argument("<name>", "Name of the new project")
-  .description("Create a new DragonRuby project.")
+  .description("Create a new DragonRuby project")
   .action(actionRunner(newCommand));
 
 program.command("register")
   .argument("<path>", "Path to a fresh DragonRuby directory")
+  .summary("Register a DragonRuby installation")
   .description(
     "Register a DragonRuby installation. This moves the installation to the $HOME/.drenv directory.",
   )
@@ -45,16 +49,20 @@ program.command("register")
 
 program.command("global")
   .argument("[version]", "Version of DragonRuby to use")
-  .description("Get or set the global version of DragonRuby.")
+  .description("Get or set the global version of DragonRuby")
   .action(actionRunner(global));
 
 program.command("local")
   .argument("[version]", "Version of DragonRuby to use")
-  .description("Get or set the local version of DragonRuby.")
+  .description("Get or set the local version of DragonRuby")
   .action(actionRunner(local));
 
 program.command("versions")
-  .description("List out all locally installed versions of DragonRuby.")
+  .description("List out all locally installed versions of DragonRuby")
   .action(actionRunner(versions));
 
+program.command("upgrade")
+  .description("Upgrade the version of drenv")
+  .action(actionRunner(upgrade));
+
 program.parse();