diff --git a/src/Actions/Create.php b/src/Actions/Create.php
index aa2599c..a56d3c9 100644
--- a/src/Actions/Create.php
+++ b/src/Actions/Create.php
@@ -11,14 +11,16 @@ trait Create
     /**
      * @param \Swis\JsonApi\Client\Interfaces\ItemInterface $item
      * @param array                                         $parameters
+     * @param array                                         $headers
      *
      * @return \Swis\JsonApi\Client\Interfaces\DocumentInterface
      */
-    public function create(ItemInterface $item, array $parameters = [])
+    public function create(ItemInterface $item, array $parameters = [], array $headers = [])
     {
         return $this->getClient()->post(
             $this->getEndpoint().'?'.http_build_query($parameters),
-            $this->documentFactory->make($item)
+            $this->documentFactory->make($item),
+            $headers,
         );
     }
 }
diff --git a/src/Actions/Delete.php b/src/Actions/Delete.php
index b55908d..3aafa63 100644
--- a/src/Actions/Delete.php
+++ b/src/Actions/Delete.php
@@ -9,11 +9,12 @@ trait Delete
     /**
      * @param string $id
      * @param array  $parameters
+     * @param array  $headers
      *
      * @return \Swis\JsonApi\Client\Interfaces\DocumentInterface
      */
-    public function delete(string $id, array $parameters = [])
+    public function delete(string $id, array $parameters = [], array $headers = [])
     {
-        return $this->getClient()->delete($this->getEndpoint().'/'.urlencode($id).'?'.http_build_query($parameters));
+        return $this->getClient()->delete($this->getEndpoint().'/'.urlencode($id).'?'.http_build_query($parameters), $headers);
     }
 }
diff --git a/src/Actions/FetchMany.php b/src/Actions/FetchMany.php
index 2af56e8..383b01b 100644
--- a/src/Actions/FetchMany.php
+++ b/src/Actions/FetchMany.php
@@ -8,11 +8,12 @@ trait FetchMany
 {
     /**
      * @param array $parameters
+     * @param array $headers
      *
      * @return \Swis\JsonApi\Client\Interfaces\DocumentInterface
      */
-    public function all(array $parameters = [])
+    public function all(array $parameters = [], array $headers = [])
     {
-        return $this->getClient()->get($this->getEndpoint().'?'.http_build_query($parameters));
+        return $this->getClient()->get($this->getEndpoint().'?'.http_build_query($parameters), $headers);
     }
 }
diff --git a/src/Actions/FetchOne.php b/src/Actions/FetchOne.php
index 05b673f..f710583 100644
--- a/src/Actions/FetchOne.php
+++ b/src/Actions/FetchOne.php
@@ -9,11 +9,12 @@ trait FetchOne
     /**
      * @param string $id
      * @param array  $parameters
+     * @param array  $headers
      *
      * @return \Swis\JsonApi\Client\Interfaces\DocumentInterface
      */
-    public function find(string $id, array $parameters = [])
+    public function find(string $id, array $parameters = [], array $headers = [])
     {
-        return $this->getClient()->get($this->getEndpoint().'/'.urlencode($id).'?'.http_build_query($parameters));
+        return $this->getClient()->get($this->getEndpoint().'/'.urlencode($id).'?'.http_build_query($parameters), $headers);
     }
 }
diff --git a/src/Actions/Save.php b/src/Actions/Save.php
index 00d14c8..c7cc50e 100644
--- a/src/Actions/Save.php
+++ b/src/Actions/Save.php
@@ -14,15 +14,16 @@ trait Save
     /**
      * @param \Swis\JsonApi\Client\Interfaces\ItemInterface $item
      * @param array                                         $parameters
+     * @param array                                         $headers
      *
      * @return \Swis\JsonApi\Client\Interfaces\DocumentInterface
      */
-    public function save(ItemInterface $item, array $parameters = [])
+    public function save(ItemInterface $item, array $parameters = [], array $headers = [])
     {
         if ($item->isNew()) {
-            return $this->saveNew($item, $parameters);
+            return $this->saveNew($item, $parameters, $headers);
         }
 
-        return $this->saveExisting($item, $parameters);
+        return $this->saveExisting($item, $parameters, $headers);
     }
 }
diff --git a/src/Actions/TakeOne.php b/src/Actions/TakeOne.php
index 171eac8..2ec36e7 100644
--- a/src/Actions/TakeOne.php
+++ b/src/Actions/TakeOne.php
@@ -8,11 +8,12 @@ trait TakeOne
 {
     /**
      * @param array $parameters
+     * @param array $headers
      *
      * @return \Swis\JsonApi\Client\Interfaces\DocumentInterface
      */
-    public function take(array $parameters = [])
+    public function take(array $parameters = [], array $headers = [])
     {
-        return $this->getClient()->get($this->getEndpoint().'?'.http_build_query($parameters));
+        return $this->getClient()->get($this->getEndpoint().'?'.http_build_query($parameters), $headers);
     }
 }
diff --git a/src/Actions/Update.php b/src/Actions/Update.php
index 0aa775b..83b7ac4 100644
--- a/src/Actions/Update.php
+++ b/src/Actions/Update.php
@@ -11,14 +11,16 @@ trait Update
     /**
      * @param \Swis\JsonApi\Client\Interfaces\ItemInterface $item
      * @param array                                         $parameters
+     * @param array                                         $headers
      *
      * @return \Swis\JsonApi\Client\Interfaces\DocumentInterface
      */
-    public function update(ItemInterface $item, array $parameters = [])
+    public function update(ItemInterface $item, array $parameters = [], array $headers = [])
     {
         return $this->getClient()->patch(
             $this->getEndpoint().'/'.urlencode($item->getId()).'?'.http_build_query($parameters),
-            $this->documentFactory->make($item)
+            $this->documentFactory->make($item),
+            $headers,
         );
     }
 }
diff --git a/tests/RepositoryTest.php b/tests/RepositoryTest.php
index a62cc2c..b50b9fb 100644
--- a/tests/RepositoryTest.php
+++ b/tests/RepositoryTest.php
@@ -50,12 +50,12 @@ public function itCanGetAll()
 
         $client->expects($this->once())
             ->method('get')
-            ->with('mocks?foo=bar')
+            ->with('mocks?foo=bar', ['Test-Header' => 'Foo-Bar'])
             ->willReturn($document);
 
         $repository = new MockRepository($client, new DocumentFactory());
 
-        $this->assertSame($document, $repository->all(['foo' => 'bar']));
+        $this->assertSame($document, $repository->all(['foo' => 'bar'], ['Test-Header' => 'Foo-Bar']));
     }
 
     /**
@@ -70,12 +70,12 @@ public function itCanTakeOne()
 
         $client->expects($this->once())
             ->method('get')
-            ->with('mocks?foo=bar')
+            ->with('mocks?foo=bar', ['Test-Header' => 'Foo-Bar'])
             ->willReturn($document);
 
         $repository = new MockRepository($client, new DocumentFactory());
 
-        $this->assertSame($document, $repository->take(['foo' => 'bar']));
+        $this->assertSame($document, $repository->take(['foo' => 'bar'], ['Test-Header' => 'Foo-Bar']));
     }
 
     /**
@@ -90,12 +90,12 @@ public function itCanFindOne()
 
         $client->expects($this->once())
             ->method('get')
-            ->with('mocks/1?foo=bar')
+            ->with('mocks/1?foo=bar', ['Test-Header' => 'Foo-Bar'])
             ->willReturn($document);
 
         $repository = new MockRepository($client, new DocumentFactory());
 
-        $this->assertSame($document, $repository->find('1', ['foo' => 'bar']));
+        $this->assertSame($document, $repository->find('1', ['foo' => 'bar'], ['Test-Header' => 'Foo-Bar']));
     }
 
     /**
@@ -111,12 +111,12 @@ public function itCanSaveNew()
 
         $client->expects($this->once())
             ->method('post')
-            ->with('mocks?foo=bar')
+            ->with('mocks?foo=bar', $document, ['Test-Header' => 'Foo-Bar'])
             ->willReturn($document);
 
         $repository = new MockRepository($client, new DocumentFactory());
 
-        $this->assertSame($document, $repository->save(new Item(), ['foo' => 'bar']));
+        $this->assertSame($document, $repository->save(new Item(), ['foo' => 'bar'], ['Test-Header' => 'Foo-Bar']));
     }
 
     /**
@@ -132,12 +132,12 @@ public function itCanSaveExisting()
 
         $client->expects($this->once())
             ->method('patch')
-            ->with('mocks/1?foo=bar')
+            ->with('mocks/1?foo=bar', $document, ['Test-Header' => 'Foo-Bar'])
             ->willReturn($document);
 
         $repository = new MockRepository($client, new DocumentFactory());
 
-        $this->assertSame($document, $repository->save((new Item())->setId('1'), ['foo' => 'bar']));
+        $this->assertSame($document, $repository->save((new Item())->setId('1'), ['foo' => 'bar'], ['Test-Header' => 'Foo-Bar']));
     }
 
     /**
@@ -152,11 +152,11 @@ public function itCanDelete()
 
         $client->expects($this->once())
             ->method('delete')
-            ->with('mocks/1?foo=bar')
+            ->with('mocks/1?foo=bar', ['Test-Header' => 'Foo-Bar'])
             ->willReturn($document);
 
         $repository = new MockRepository($client, new DocumentFactory());
 
-        $this->assertSame($document, $repository->delete('1', ['foo' => 'bar']));
+        $this->assertSame($document, $repository->delete('1', ['foo' => 'bar'], ['Test-Header' => 'Foo-Bar']));
     }
 }