diff --git a/build/src/php/VersionUpdater/DependencyProvider.php b/build/src/php/VersionUpdater/DependencyProvider.php
new file mode 100644
index 0000000..8bcb253
--- /dev/null
+++ b/build/src/php/VersionUpdater/DependencyProvider.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhelWeb\VersionUpdater;
+
+use Gacela\Framework\AbstractProvider;
+use Gacela\Framework\Container\Container;
+use Phel\Console\ConsoleFacade;
+use Phel\Shared\Facade\ConsoleFacadeInterface;
+
+/**
+ * @method Factory getFactory()
+ */
+final class DependencyProvider extends AbstractProvider
+{
+    public const string FACADE_PHEL_CONSOLE = 'FACADE_PHEL_CONSOLE';
+
+    public function provideModuleDependencies(Container $container): void
+    {
+        $container->set(self::FACADE_PHEL_CONSOLE, function (Container $container) {
+            return $container->getLocator()->get(ConsoleFacade::class);
+        });
+    }
+}
diff --git a/build/src/php/VersionUpdater/Facade.php b/build/src/php/VersionUpdater/Facade.php
new file mode 100644
index 0000000..e28a9b0
--- /dev/null
+++ b/build/src/php/VersionUpdater/Facade.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhelWeb\VersionUpdater;
+
+use Gacela\Framework\AbstractFacade;
+
+/**
+ * @method Factory getFactory()
+ */
+final class Facade extends AbstractFacade
+{
+    public function updateTomlFile(): void
+    {
+        $this->getFactory()
+            ->createPhelVersionUpdater()
+            ->update();
+    }
+}
diff --git a/build/src/php/VersionUpdater/Factory.php b/build/src/php/VersionUpdater/Factory.php
new file mode 100644
index 0000000..905d245
--- /dev/null
+++ b/build/src/php/VersionUpdater/Factory.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhelWeb\VersionUpdater;
+
+use Gacela\Framework\AbstractFactory;
+use Gacela\Framework\Config\Config;
+use Phel\Shared\Facade\ConsoleFacadeInterface;
+use PhelWeb\VersionUpdater\Infrastructure\PhelVersionUpdater;
+
+/**
+ * @method Config getConfig()
+ */
+final class Factory extends AbstractFactory
+{
+    public function createPhelVersionUpdater(): PhelVersionUpdater
+    {
+        return new PhelVersionUpdater(
+            $this->getPhelConsoleFacade(),
+            $this->getConfigFileLocation(),
+        );
+    }
+
+    private function getPhelConsoleFacade(): ConsoleFacadeInterface
+    {
+        return $this->getProvidedDependency(DependencyProvider::FACADE_PHEL_CONSOLE);
+    }
+
+    private function getConfigFileLocation(): string
+    {
+        return $this->getConfig()->getAppRootDir() . '/../config.toml';
+    }
+}
diff --git a/build/src/php/VersionUpdater/Infrastructure/PhelVersionUpdater.php b/build/src/php/VersionUpdater/Infrastructure/PhelVersionUpdater.php
new file mode 100644
index 0000000..c5721b3
--- /dev/null
+++ b/build/src/php/VersionUpdater/Infrastructure/PhelVersionUpdater.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhelWeb\VersionUpdater\Infrastructure;
+
+use Phel\Shared\Facade\ConsoleFacadeInterface;
+
+final readonly class PhelVersionUpdater
+{
+    private const string REGEX_PHEL_VERSION_FINDER = '/^phel_version\s*=\s*"[^"]*"/m';
+
+    public function __construct(
+        private ConsoleFacadeInterface $consoleFacade,
+        private string $configFile,
+    ) {
+    }
+
+    public function update(): void
+    {
+        $configContent = file_get_contents($this->configFile);
+
+        $phelVersion = $this->consoleFacade->getVersion();
+        $updatedContent = preg_replace(
+            self::REGEX_PHEL_VERSION_FINDER,
+            'phel_version = "' . $phelVersion . '"',
+            $configContent
+        );
+
+        if ($updatedContent !== $configContent) {
+            file_put_contents($this->configFile, $updatedContent);
+        }
+    }
+}
diff --git a/build/tests/php/VersionUpdater/Integration/PhelVersionUpdaterTest.php b/build/tests/php/VersionUpdater/Integration/PhelVersionUpdaterTest.php
new file mode 100644
index 0000000..985a101
--- /dev/null
+++ b/build/tests/php/VersionUpdater/Integration/PhelVersionUpdaterTest.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhelWebTests\VersionUpdater\Integration;
+
+use Phel\Shared\Facade\ConsoleFacadeInterface;
+use PhelWeb\VersionUpdater\Infrastructure\PhelVersionUpdater;
+use PHPUnit\Framework\TestCase;
+
+final class PhelVersionUpdaterTest extends TestCase
+{
+    /** @var false|resource */
+    private $file;
+
+    protected function setUp(): void
+    {
+        $this->file = tmpfile();
+        fwrite($this->file, 'phel_version = "v.0.9"');
+    }
+
+    protected function tearDown(): void
+    {
+        fclose($this->file);
+    }
+
+    public function test_update_phel_version(): void
+    {
+        $consoleFacade = $this->createAnonConsoleFacade();
+
+        $path = stream_get_meta_data($this->file)['uri'];
+        $phelVersionUpdater = new PhelVersionUpdater($consoleFacade, $path);
+        $phelVersionUpdater->update();
+
+        $content = file_get_contents($path);
+
+        $expected = 'phel_version = "v1.0"';
+
+        self::assertSame($expected, $content);
+    }
+
+    private function createAnonConsoleFacade(): ConsoleFacadeInterface
+    {
+        return new class implements ConsoleFacadeInterface {
+
+            public function getVersion(): string
+            {
+                return 'v1.0';
+            }
+
+            public function runConsole(): void
+            {
+                // ignore
+            }
+        };
+    }
+}
diff --git a/build/update-phel-version.php b/build/update-phel-version.php
new file mode 100644
index 0000000..39c4c50
--- /dev/null
+++ b/build/update-phel-version.php
@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../vendor/autoload.php';
+
+use Gacela\Framework\Gacela;
+use Phel\Phel;
+use PhelWeb\VersionUpdater\Facade as VersionUpdaterFacade;
+
+Gacela::bootstrap(__DIR__, Phel::configFn());
+
+$facade = new VersionUpdaterFacade();
+$facade->updateTomlFile();
diff --git a/composer.json b/composer.json
index d903f1d..8653228 100644
--- a/composer.json
+++ b/composer.json
@@ -41,6 +41,12 @@
             "php build/api-page.php",
             "php build/api-search.php"
         ],
-        "test": "./vendor/bin/phpunit"
+        "test": "./vendor/bin/phpunit",
+        "post-install-cmd": [
+            "php build/update-phel-version.php"
+        ],
+        "post-update-cmd": [
+            "php build/update-phel-version.php"
+        ]
     }
 }
diff --git a/config.toml b/config.toml
index bbff8d2..1aa9504 100644
--- a/config.toml
+++ b/config.toml
@@ -28,5 +28,5 @@ extra_syntaxes_and_themes = ["syntaxes"]
 # Put all your custom variables here
 
 repo_content_url = "https://github.com/phel-lang/phel-lang.org/blob/master/content/"
-phel_version = "0.23.1"
+phel_version = "v0.23.1"
 
diff --git a/templates/footer.html b/templates/footer.html
index 998528f..a40d962 100644
--- a/templates/footer.html
+++ b/templates/footer.html
@@ -52,7 +52,7 @@ <h3>Community</h3>
             <div class="footer-badges">
                 <span class="footer-badge">PHP 8.3+ Required</span>
                 <span class="footer-badge-separator">•</span>
-                <span class="footer-badge footer-badge-version">v{{ config.extra.phel_version }}</span>
+                <span class="footer-badge footer-badge-version">{{ config.extra.phel_version }}</span>
             </div>
         </div>
     </div>