diff --git a/packages/framework/src/Actions/PostBuildTasks/GenerateBuildManifest.php b/packages/framework/src/Actions/PostBuildTasks/GenerateBuildManifest.php
index eb42a1a2191..0351f74ab8a 100644
--- a/packages/framework/src/Actions/PostBuildTasks/GenerateBuildManifest.php
+++ b/packages/framework/src/Actions/PostBuildTasks/GenerateBuildManifest.php
@@ -7,8 +7,13 @@
 use Illuminate\Console\OutputStyle;
 use Illuminate\Support\Collection;
 
+/**
+ * @see \Hyde\Framework\Testing\Unit\GenerateBuildManifestTest
+ */
 class GenerateBuildManifest extends AbstractBuildTask
 {
+    public static string $description = 'Generating build manifest';
+
     public function __construct(?OutputStyle $output = null)
     {
         parent::__construct($output);
@@ -23,8 +28,8 @@ public function run(): void
         foreach (Hyde::pages() as $page) {
             $manifest->push([
                 'page' => $page->getSourcePath(),
-                'source_hash' => md5(Hyde::path($page->getSourcePath())),
-                'output_hash' => md5(Hyde::path($page->getOutputPath())),
+                'source_hash' => md5_file(Hyde::path($page->getSourcePath())),
+                'output_hash' => $this->hashOutputPath(Hyde::getSiteOutputPath($page->getOutputPath())),
             ]);
         }
 
@@ -32,4 +37,9 @@ public function run(): void
             'storage/framework/cache/build-manifest.json')
         ), $manifest->toJson());
     }
+
+    protected function hashOutputPath(string $path): ?string
+    {
+        return file_exists($path) ? md5_file($path) : null;
+    }
 }
diff --git a/packages/framework/tests/Unit/GenerateBuildManifestTest.php b/packages/framework/tests/Unit/GenerateBuildManifestTest.php
new file mode 100644
index 00000000000..ed7dfdc9e72
--- /dev/null
+++ b/packages/framework/tests/Unit/GenerateBuildManifestTest.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace Hyde\Framework\Testing\Unit;
+
+use Hyde\Framework\Actions\PostBuildTasks\GenerateBuildManifest;
+use Hyde\Framework\Hyde;
+use Hyde\Testing\TestCase;
+
+/**
+ * @covers \Hyde\Framework\Actions\PostBuildTasks\GenerateBuildManifest
+ */
+class GenerateBuildManifestTest extends TestCase
+{
+    public function test_action_generates_build_manifest()
+    {
+        (new GenerateBuildManifest())->run();
+
+        $this->assertFileExists(Hyde::path('storage/framework/cache/build-manifest.json'));
+
+        $manifest = json_decode(file_get_contents(Hyde::path('storage/framework/cache/build-manifest.json')), true);
+
+        $this->assertIsArray($manifest);
+        $this->assertCount(2, $manifest);
+
+        $this->assertArrayHasKey('page', $manifest[0]);
+        $this->assertArrayHasKey('source_hash', $manifest[0]);
+        $this->assertArrayHasKey('output_hash', $manifest[0]);
+
+        $this->assertStringContainsString('_pages/404.blade.php', $manifest[0]['page']);
+        $this->assertStringContainsString('_pages/index.blade.php', $manifest[1]['page']);
+    }
+}