diff --git a/docs/components/cache/adapters.md b/docs/components/cache/adapters.md
index 719f7666..0f2875aa 100644
--- a/docs/components/cache/adapters.md
+++ b/docs/components/cache/adapters.md
@@ -17,6 +17,9 @@ Requires the APCu extension is loaded and enabled.
 use SonsOfPHP\Componenet\Cache\Adapter\ApcuAdapter;
 
 $cache = new ApcuAdapter();
+
+// You can set a default TTL in seconds and Marshaller as well.
+$cache = new ApcuAdapter(60, new CustomMarshaller());
 ```
 
 ## ArrayAdapter
@@ -49,6 +52,22 @@ $cache = new ChainAdapter([
 ]);
 ```
 
+## FilesystemAdapter
+
+Stores cache files on disk
+
+```php
+<?php
+
+use SonsOfPHP\Componenet\Cache\Adapter\FilesystemAdapter;
+
+$cache = new FilesystemAdapter();
+
+// You can configure the directory, default permissions, default ttl, and
+// marshaller
+$cache = new FilesystemAdapter('/path/to/cache', 0777, 60, new CustomMarshaller());
+```
+
 ## NullAdapter
 
 Mainly used for testing, however you could have some checks in place and if
diff --git a/docs/components/cache/marshallers.md b/docs/components/cache/marshallers.md
index 0a13608f..580999c1 100644
--- a/docs/components/cache/marshallers.md
+++ b/docs/components/cache/marshallers.md
@@ -31,3 +31,8 @@ use SonsOfPHP\Componenet\Cache\Marshaller\JsonMarshaller;
 
 $marshaller = new JsonMarshaller();
 ```
+
+# Custom Marshaller
+
+You can create a custom marshaller. For example, you could create one the
+encrypts/decrypts the values.
diff --git a/src/SonsOfPHP/Component/Cache/Tests/CacheItemTest.php b/src/SonsOfPHP/Component/Cache/Tests/CacheItemTest.php
index b5a35f8f..6dcb487e 100644
--- a/src/SonsOfPHP/Component/Cache/Tests/CacheItemTest.php
+++ b/src/SonsOfPHP/Component/Cache/Tests/CacheItemTest.php
@@ -129,4 +129,12 @@ public static function invalidKeysProvider(): iterable
 
         yield 'reserved' => ['contains@reserved}characters'];
     }
+
+    public function testItCanReturnExpiry(): void
+    {
+        $item = new CacheItem('testing');
+        $this->assertNull($item->expiry());
+        $item->expiresAfter(3600);
+        $this->assertNotNull($item->expiry());
+    }
 }
diff --git a/src/SonsOfPHP/Component/Cache/Tests/SimpleCacheTest.php b/src/SonsOfPHP/Component/Cache/Tests/SimpleCacheTest.php
index c3b1e28f..dea59f3c 100644
--- a/src/SonsOfPHP/Component/Cache/Tests/SimpleCacheTest.php
+++ b/src/SonsOfPHP/Component/Cache/Tests/SimpleCacheTest.php
@@ -145,4 +145,18 @@ public function testGetMultiple(): void
         $this->assertSame('default.value', $items['item.key']);
         $this->assertSame('item2.value', $items['item2']);
     }
+
+    public function testItWillSaveWhenTTLIsSet(): void
+    {
+        $item = $this->createMock(CacheItemInterface::class);
+        $item->expects($this->once())->method('set');
+        $item->expects($this->once())->method('expiresAfter');
+
+        $this->adapter->expects($this->once())->method('getItem')->willReturn($item);
+        $this->adapter->expects($this->once())->method('save')->willReturn(true);
+
+        $cache = new SimpleCache($this->adapter);
+
+        $this->assertTrue($cache->set('item.key', 'item.value', 60));
+    }
 }