diff --git a/src/Twig/Functions/IconExtension.php b/src/Twig/Functions/IconExtension.php
index 84137f1..0a65dc6 100644
--- a/src/Twig/Functions/IconExtension.php
+++ b/src/Twig/Functions/IconExtension.php
@@ -4,7 +4,6 @@ declare(strict_types=1);
 
 namespace Pcm\IconBundle\Twig\Functions;
 
-use InvalidArgumentException;
 use Twig\Extension\AbstractExtension;
 use Twig\TwigFunction;
 
@@ -23,7 +22,7 @@ final class IconExtension extends AbstractExtension
     public function __construct(private array $directories, private array $palletes)
     {
         if (empty($this->directories))
-            throw new InvalidArgumentException('Directories array must contain at least one path!');
+            throw new \InvalidArgumentException('Directories array must contain at least one path!');
 
         $dirsContainNonString = array_reduce($this->directories,
             fn($notString, $path) => $notString || !is_string($path));
@@ -32,7 +31,7 @@ final class IconExtension extends AbstractExtension
             throw new \TypeError('Directories array must only contain strings!');
 
         if (empty($this->palletes))
-            throw new InvalidArgumentException('Palletes array must contain at least one pallet!');
+            throw new \InvalidArgumentException('Palletes array must contain at least one pallet!');
 
         $pelletesContainNonarray = array_reduce($this->palletes,
             fn($notArray, $path) => $notArray || !is_array($path));
@@ -82,13 +81,14 @@ final class IconExtension extends AbstractExtension
     {
         $options = $this->mergeUserOptionsWithDefaults($userOptions);
 
+        $this->throwIfUnrecognisedOptionExists($options);
+
         $iconFilepath = $this->findSvgFilepath($options['icon']);
         $rawSvgMarkup = $this->getSvgMarkup($iconFilepath);
         $cleanSvgMarkup = $this->cleanSvgMarkup($rawSvgMarkup);
 
         $mainPallete = $this->getPallete($options['colour']);
 
-
         $colourClasses = "{$mainPallete['stroke']} {$mainPallete['fill']}";
 
         if (null !== $options['hover']) {
@@ -121,6 +121,14 @@ final class IconExtension extends AbstractExtension
         return array_merge(self::DEFAULT_OPTIONS, $userOptions);
     }
 
+    private function throwIfUnrecognisedOptionExists(array $options): void
+    {
+        foreach (array_keys($options) as $key) {
+            if (!key_exists($key, self::DEFAULT_OPTIONS))
+                throw new \InvalidArgumentException("Unrecognised option '{$key}'!");
+        }
+    }
+
     private function findSvgFilepath(string $iconName): string
     {
         foreach ($this->directories as $directory) {
diff --git a/tests/Twig/Functions/IconExtensionTest.php b/tests/Twig/Functions/IconExtensionTest.php
index ae6f3aa..45962d7 100644
--- a/tests/Twig/Functions/IconExtensionTest.php
+++ b/tests/Twig/Functions/IconExtensionTest.php
@@ -299,4 +299,11 @@ class IconExtensionTest extends TestCase
         $this->assertMatchesRegularExpression('/<svg.+class=".*group-hover:fill-white.*".*>/', $contents);
         $this->assertMatchesRegularExpression('/<svg.+class=".*group-hover:stroke-white.*".*>/', $contents);
     }
+
+    public function testThrowsIfInvalidOptionPassed(): void
+    {
+        $this->expectException(\InvalidArgumentException::class);
+        $this->icon->renderIcon(['icon' => self::ICON, 'fake-key-should-throw' => null]);
+
+    }
 }