diff --git a/readme.md b/readme.md
index 4bc76df..3753654 100644
--- a/readme.md
+++ b/readme.md
@@ -1,6 +1,6 @@
 # Font Awesome SVG - PHP
 
-A PHP class that can be used to add [Font Awesome 5+](https://fontawesome.com/)'s SVG icons inline without Javascript.
+A PHP class that can be used to add [Font Awesome 6+](https://fontawesome.com/)'s SVG icons inline without Javascript.
 
 ## Installation
 
@@ -26,37 +26,37 @@ Or you can download the `FontAwesomeSVG.php` file and include it manually.
 // $dir = directory where SVG files are
 $FA = new FontAwesomeSVG($dir);
 
-echo $FA->get_svg('fas fa-file');
+echo $FA->get_svg('fa-solid fa-file');
 ```
 
 Add custom classes:
 
 ```php
-echo $FA->get_svg('fas fa-file', ['class' => 'my-custom-class another-class']);
+echo $FA->get_svg('fa-solid fa-file', ['class' => 'my-custom-class another-class']);
 ```
 
 Remove default class `.svg-inline--fa`:
 
 ```php
-echo $FA->get_svg('fas fa-file', ['default_class' => false]);
+echo $FA->get_svg('fa-solid fa-file', ['default_class' => false]);
 ```
 
 Change `<path>` fill (default is `currentColor`):
 
 ```php
-echo $FA->get_svg('fas fa-file', ['fill' => '#f44336']);
+echo $FA->get_svg('fa-solid fa-file', ['fill' => '#f44336']);
 ```
 
 Add `<title></title>`:
 
 ```php
-echo $FA->get_svg('fas fa-file', ['title' => 'My accessible icon']);
+echo $FA->get_svg('fa-solid fa-file', ['title' => 'My accessible icon']);
 ```
 
 Multiple options at once:
 
 ```php
-echo $FA->get_svg('fas fa-file', [
+echo $FA->get_svg('fa-solid fa-file', [
     'class' => 'my-custom-class another-class',
     'default_class' => false,
     'title' => 'My title',
@@ -68,7 +68,7 @@ echo $FA->get_svg('fas fa-file', [
 Customise duotone icons:
 
 ```php
-echo $FA->get_svg('fad fa-laugh-wink', [
+echo $FA->get_svg('fa-duotone fa-laugh-wink', [
     'primary' => [
         'fill'    => '#e64980',
     ],
@@ -95,6 +95,16 @@ echo $FA->get_svg('fad fa-laugh-wink', [
 
 > Requires **v5.10.0** or greater, and a FontAwesome Pro license
 
+## Sharp
+
+> Requires **v6.4.0** or greater, and a FontAwesome Pro license
+
+```php
+echo $FA->get_svg('fa-sharp fa-light fa-file');
+echo $FA->get_svg('fa-sharp fa-regular fa-file');
+echo $FA->get_svg('fa-sharp fa-solid fa-file');
+```
+
 ### options
 
 If `inline_style` is enabled, the value of `fill` and `opacity` are also used in the inline style on `<svg>` tag.
@@ -149,6 +159,24 @@ echo $FA->get_svg('fad fa-laugh-wink', [
 ]);
 ```
 
+## Aliases
+
+The short aliases from version 5 are still supported
+
+```php
+echo $FA->get_svg('fab fa-twitter');
+echo $FA->get_svg('fad fa-file');
+echo $FA->get_svg('fal fa-file');
+echo $FA->get_svg('far fa-file');
+echo $FA->get_svg('fas fa-file');
+
+// And the new shorthands for thin and sharp
+echo $FA->get_svg('fat fa-file'); // thin
+echo $FA->get_svg('fasl fa-file'); // sharp-light
+echo $FA->get_svg('fasr fa-file'); // sharp-regular
+echo $FA->get_svg('fass fa-file'); // sharp-solid
+```
+
 ## Accessibility
 
 The below is implemented based on:
@@ -169,7 +197,7 @@ The below is implemented based on:
 You can set a `<title>`, an `id` for the `<title>` and the `aria-labelledby` attribute will be added automatically:
 
 ```php
-echo $FA->get_svg('fas fa-file', [
+echo $FA->get_svg('fa-solid fa-file', [
     'title' => 'File',
     'title_id' => 'file-id',
 ]);
@@ -186,7 +214,7 @@ echo $FA->get_svg('fas fa-file', [
 You can add any aria-\* attribute to the SVG tag:
 
 ```php
-echo $FA->get_svg('fas fa-file', [
+echo $FA->get_svg('fa-solid fa-file', [
     'aria-label' => 'File',
 ]);
 ```
@@ -200,7 +228,7 @@ echo $FA->get_svg('fas fa-file', [
 `aria-hidden="true"` is added to the SVG tag by default unless `<title id="">` (and `aria-labelledby`) or `aria-label` is set.
 
 ```php
-echo $FA->get_svg('fas fa-file');
+echo $FA->get_svg('fa-solid fa-file');
 ```
 
 ```html
diff --git a/src/FontAwesomeSVG.php b/src/FontAwesomeSVG.php
index cb4138f..9f1f586 100644
--- a/src/FontAwesomeSVG.php
+++ b/src/FontAwesomeSVG.php
@@ -174,13 +174,14 @@ public function get_svg($id, $opts=[]) {
     public function get_icon_details($id) {
         $icon = array();
 
-        $id = explode(' ', $id);
-        $dir = $this->get_icon_dir($id[0]);
-        $filename = $this->get_icon_filename($id[1]);
+        $classes = explode(' ', $id);
+        $dir = $this->get_icon_dir($classes);
+        $filename = $this->get_icon_filename($classes, $dir);
+        $filepath = $this->get_icon_filepath($dir, $filename);
 
         $icon['dir'] = $dir;
         $icon['filename'] = $filename;
-        $icon['filepath'] = str_replace('/', DIRECTORY_SEPARATOR, "$this->svg_dir/$dir/$filename.svg");
+        $icon['filepath'] = $filepath;
 
         if(!is_file($icon['filepath'])) {
             throw new Exception('File ' . $icon['filepath'] . ' does not exist.');
@@ -198,30 +199,33 @@ public function get_icon_details($id) {
      * @param string $style
      * @return string
      */
-    public function get_icon_dir($style) {
-        switch($style) {
-            case 'far':
-                $dir = 'regular';
-                break;
+    public function get_icon_dir($classes) {
+        if (in_array('fa-sharp', $classes)) {
+            if (in_array('fa-regular', $classes)) return 'sharp-regular';
+            if (in_array('fa-light', $classes)) return 'sharp-light';
+            if (in_array('fa-solid', $classes)) return 'sharp-solid';
+        }
 
-            case 'fal':
-                $dir = 'light';
-                break;
+        if (in_array('fasr', $classes)) return 'sharp-regular';
+        if (in_array('fasl', $classes)) return 'sharp-light';
+        if (in_array('fass', $classes)) return 'sharp-solid';
 
-            case 'fab':
-                $dir = 'brands';
-                break;
+        if (in_array('far', $classes)) return 'regular';
+        if (in_array('fa-regular', $classes)) return 'regular';
 
-            case 'fad':
-                $dir = 'duotone';
-                break;
+        if (in_array('fal', $classes)) return 'light';
+        if (in_array('fa-light', $classes)) return 'light';
 
-            case 'fas': 
-            default:
-                $dir = 'solid';
-        }
+        if (in_array('fab', $classes)) return 'brands';
+        if (in_array('fa-brands', $classes)) return 'brands';
 
-        return $dir;
+        if (in_array('fad', $classes)) return 'duotone';
+        if (in_array('fa-duotone', $classes)) return 'duotone';
+
+        if (in_array('fat', $classes)) return 'thin';
+        if (in_array('fa-thin', $classes)) return 'thin';
+
+        return 'solid';
     }
 
 
@@ -230,10 +234,36 @@ public function get_icon_dir($style) {
     /**
      * Get the icon's SVG file name
      * 
-     * @param string $icon_name
+     * @param array $classes
+     * @param string $dir
+     * @return string
+     */
+    public function get_icon_filename($classes, $dir) {
+        foreach ($classes as $class) {
+            $filename = str_replace('fa-', '', $class);
+            $path = $this->get_icon_filepath($dir, $filename);
+
+            if (is_file($path)) {
+                return $filename;
+            }
+        }
+
+        $id = join(' ', $classes);
+
+        throw new Exception("No icon found for '$id'");
+    }
+
+
+
+
+    /**
+     * Get the icon's SVG file path
+     * 
+     * @param string $dir
+     * @param string $filename
      * @return string
      */
-    public function get_icon_filename($icon_name) {
-        return str_replace('fa-', '', $icon_name);
+    public function get_icon_filepath($dir, $filename) {
+        return str_replace('/', DIRECTORY_SEPARATOR, "$this->svg_dir/$dir/$filename.svg");
     }
-}
\ No newline at end of file
+}
diff --git a/tests/Fixtures/icons/sharp-light/test.svg b/tests/Fixtures/icons/sharp-light/test.svg
new file mode 100644
index 0000000..9333296
--- /dev/null
+++ b/tests/Fixtures/icons/sharp-light/test.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2023 Fonticons, Inc. --><path d="M397.694,25.056L14.611,461.893C6.605,471.022 7.517,484.933 16.647,492.939C25.776,500.944 39.687,500.032 47.693,490.903L430.775,54.067C438.781,44.938 437.869,31.027 428.74,23.021C419.611,15.015 405.699,15.927 397.694,25.056Z"/></svg>
diff --git a/tests/Fixtures/icons/sharp-regular/test.svg b/tests/Fixtures/icons/sharp-regular/test.svg
new file mode 100644
index 0000000..9333296
--- /dev/null
+++ b/tests/Fixtures/icons/sharp-regular/test.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2023 Fonticons, Inc. --><path d="M397.694,25.056L14.611,461.893C6.605,471.022 7.517,484.933 16.647,492.939C25.776,500.944 39.687,500.032 47.693,490.903L430.775,54.067C438.781,44.938 437.869,31.027 428.74,23.021C419.611,15.015 405.699,15.927 397.694,25.056Z"/></svg>
diff --git a/tests/Fixtures/icons/sharp-solid/test.svg b/tests/Fixtures/icons/sharp-solid/test.svg
new file mode 100644
index 0000000..9333296
--- /dev/null
+++ b/tests/Fixtures/icons/sharp-solid/test.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2023 Fonticons, Inc. --><path d="M397.694,25.056L14.611,461.893C6.605,471.022 7.517,484.933 16.647,492.939C25.776,500.944 39.687,500.032 47.693,490.903L430.775,54.067C438.781,44.938 437.869,31.027 428.74,23.021C419.611,15.015 405.699,15.927 397.694,25.056Z"/></svg>
diff --git a/tests/Fixtures/icons/thin/test.svg b/tests/Fixtures/icons/thin/test.svg
new file mode 100644
index 0000000..9333296
--- /dev/null
+++ b/tests/Fixtures/icons/thin/test.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2023 Fonticons, Inc. --><path d="M397.694,25.056L14.611,461.893C6.605,471.022 7.517,484.933 16.647,492.939C25.776,500.944 39.687,500.032 47.693,490.903L430.775,54.067C438.781,44.938 437.869,31.027 428.74,23.021C419.611,15.015 405.699,15.927 397.694,25.056Z"/></svg>
diff --git a/tests/Unit/FontAwesomeSVGTest.php b/tests/Unit/FontAwesomeSVGTest.php
index 9884806..4874296 100644
--- a/tests/Unit/FontAwesomeSVGTest.php
+++ b/tests/Unit/FontAwesomeSVGTest.php
@@ -11,11 +11,24 @@ final class FontAwesomeSVGTest extends TestCase
     static public function icons(): array
     {
         return [
-            ['fab fa-test'],
-            ['fad fa-test'],
-            ['fal fa-test'],
-            ['far fa-test'],
-            ['fas fa-test'],
+            ['fab fa-test', 'brands', 'test'],
+            ['fad fa-test', 'duotone', 'test'],
+            ['fal fa-test', 'light', 'test'],
+            ['far fa-test', 'regular', 'test'],
+            ['fas fa-test', 'solid', 'test'],
+            ['fat fa-test', 'thin', 'test'],
+            ['fa-brands fa-test', 'brands', 'test'],
+            ['fa-duotone fa-test', 'duotone', 'test'],
+            ['fa-light fa-test', 'light', 'test'],
+            ['fa-regular fa-test', 'regular', 'test'],
+            ['fa-solid fa-test', 'solid', 'test'],
+            ['fa-thin fa-test', 'thin', 'test'],
+            ['fa-sharp fa-light fa-test', 'sharp-light', 'test'],
+            ['fa-sharp fa-regular fa-test', 'sharp-regular', 'test'],
+            ['fa-sharp fa-solid fa-test', 'sharp-solid', 'test'],
+            ['fasl fa-test', 'sharp-light', 'test'],
+            ['fasr fa-test', 'sharp-regular', 'test'],
+            ['fass fa-test', 'sharp-solid', 'test'],
         ];
     }
 
@@ -173,4 +186,17 @@ public function test_it_can_remove_duotone_inline_styles(): void
         $this->assertStringNotContainsString('--fa-secondary-color', $svg);
         $this->assertStringNotContainsString('--fa-secondary-opacity', $svg);
     }
+
+    /**
+     * @dataProvider icons
+     */
+    public function test_it_can_get_the_icons($icon, $dir, $filename): void
+    {
+        $fa = $this->createInstance();
+
+        $details = $fa->get_icon_details($icon);
+
+        $this->assertStringContainsString($dir, $details['dir']);
+        $this->assertStringContainsString($filename, $details['filename']);
+    }
 }