diff --git a/src/CommonMark/KeylighterCodeRenderer.php b/src/CommonMark/KeylighterCodeRenderer.php
index 30affb7..82a89cb 100644
--- a/src/CommonMark/KeylighterCodeRenderer.php
+++ b/src/CommonMark/KeylighterCodeRenderer.php
@@ -2,8 +2,10 @@
 
 namespace App\CommonMark;
 
+use Kadet\Highlighter\Formatter\HtmlFormatter;
 use Kadet\Highlighter\KeyLighter;
 use League\CommonMark\Block\Element\AbstractBlock;
+use League\CommonMark\Block\Element\FencedCode;
 use League\CommonMark\Block\Renderer\BlockRendererInterface;
 use League\CommonMark\ElementRendererInterface;
 use League\CommonMark\HtmlElement;
@@ -16,7 +18,7 @@ class KeylighterCodeRenderer implements BlockRendererInterface
     public function __construct(KeyLighter $keylighter)
     {
         $this->keylighter = $keylighter;
-        $this->formatter  = $keylighter->getFormatter('html');
+        $this->formatter  = new HtmlFormatter();
     }
 
     /**
@@ -24,7 +26,7 @@ class KeylighterCodeRenderer implements BlockRendererInterface
      */
     public function render(AbstractBlock $block, ElementRendererInterface $htmlRenderer, bool $inTightList = false)
     {
-        $language = $this->keylighter->getLanguage($block->getInfo());
+        $language = $this->keylighter->getLanguage($block instanceof FencedCode ? $block->getInfo() : 'plaintext');
         $text     = $block->getStringContent();
 
         return new HtmlElement('pre', ['class' => 'keylighter'], @$this->keylighter->highlight($text, $language, $this->formatter));
diff --git a/src/Service/KeyLighterVersioner.php b/src/Service/KeyLighterVersioner.php
index 6bb6a28..76ab9dd 100755
--- a/src/Service/KeyLighterVersioner.php
+++ b/src/Service/KeyLighterVersioner.php
@@ -7,6 +7,7 @@ use Kadet\Highlighter\KeyLighter;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Messenger\MessageBusInterface;
+use Tightenco\Collect\Support\Collection;
 
 class KeyLighterVersioner
 {
@@ -47,7 +48,7 @@ class KeyLighterVersioner
         $info = $this->getPackageInfo();
         $installed = $this->getInstalledInfo();
 
-        foreach ($info as $version => $revision) {
+        foreach ($this->reduceVersions($info) as $version => $revision) {
             if (array_key_exists($version, $installed) && $installed[$version] == $revision['dist']['reference']) {
                 continue;
             }
@@ -56,6 +57,37 @@ class KeyLighterVersioner
         }
     }
 
+    private function reduceVersions($info)
+    {
+        return collect($info)
+            ->filter(function ($metadata, $version) {
+                // only dev-master and proper versions
+                return $version === "dev-master" || ($version[0] === 'v' && version_compare(substr($version, 1), '0.7.0', '>'));
+            })
+            ->groupBy(function ($metadata, $version) {
+                if ($version[0] !== 'v') {
+                    return $version;
+                }
+
+                return preg_replace("/v(\d+\.\d+).*$/", '$1', $version);
+            })
+            ->map(function (Collection $metadata, $version) {
+                return $metadata->reduce(function ($a, $b) {
+                    if ($a === null) {
+                        return $b;
+                    }
+
+                    return strtotime($a['time']) > strtotime($b['time']) ? $a : $b;
+                });
+            })
+            ->map(function ($revision, $version) {
+                $revision['version'] = $version;
+
+                return $revision;
+            })
+        ;
+    }
+
     private function getPackageInfo()
     {
         return json_decode(file_get_contents(self::URL), true)['packages']['kadet/keylighter'];