diff --git a/CHANGELOG.md b/CHANGELOG.md
index f9f5a9b..6cba5d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Changelog
 ## main
-- Added a exception when the file is not found in a estate file query
+
+## v0.7.3
+- Added an exception when the file is not found in a estate file query
+- Added a modify method for estate files
 
 ## v0.7.2
 - Fixed a typo where the delete method of estate files returns an error
diff --git a/src/Query/EstateFileBuilder.php b/src/Query/EstateFileBuilder.php
index 11ce449..74d9674 100644
--- a/src/Query/EstateFileBuilder.php
+++ b/src/Query/EstateFileBuilder.php
@@ -102,7 +102,19 @@ public function each(callable $callback): void
      */
     public function modify(int $id): bool
     {
-        throw new OnOfficeException('Not implemented');
+        $parameters = array_replace($this->modifies, [
+            'fileId' => $id,
+            'parentid' => $this->estateId,
+            'relationtype' => 'estate',
+        ]);
+
+        $response = $this->onOfficeService->requestApi(
+            OnOfficeAction::Modify,
+            OnOfficeResourceType::FileRelation,
+            parameters: $parameters,
+        );
+
+        return $response->json('response.results.0.data.records.0.elements.success') === 'success';
     }
 
     /**
diff --git a/src/Query/UploadBuilder.php b/src/Query/UploadBuilder.php
index a4b88b8..14a98b3 100644
--- a/src/Query/UploadBuilder.php
+++ b/src/Query/UploadBuilder.php
@@ -83,30 +83,32 @@ public function save(string $fileContent): string
     }
 
     /**
+     * Returns the linked file data.
+     *
      * @throws OnOfficeException
      */
-    public function link(string $tmpUploadId, array $data = []): self
+    public function link(string $tmpUploadId, array $data = []): array
     {
         $data = array_replace($data, [
             'tmpUploadId' => $tmpUploadId,
         ]);
 
-        $this->onOfficeService->requestApi(
+        $response = $this->onOfficeService->requestApi(
             OnOfficeAction::Do,
             OnOfficeResourceType::UploadFile,
             parameters: $data,
         );
 
-        return $this;
+        return $response->json('response.results.0.data.records.0');
     }
 
     /**
      * File content as base64-encoded binary data.
-     * Returns the temporary upload id.
+     * Returns the linked file data.
      *
      * @throws OnOfficeException
      */
-    public function saveAndLink(string $fileContent, array $data = []): self
+    public function saveAndLink(string $fileContent, array $data = []): array
     {
         $tmpUploadId = $this->save($fileContent);