diff --git a/.release.json b/.release.json
index 692e01e..b604406 100644
--- a/.release.json
+++ b/.release.json
@@ -1,9 +1,9 @@
 {
   "source": {
     "repo_url": "https://github.com/onfido/onfido-openapi-spec",
-    "short_sha": "83ae3ce",
-    "long_sha": "83ae3cea0eb3901c02aa3af203856e1d55d84d87",
-    "version": "v5.3.0"
+    "short_sha": "22e3bd3",
+    "long_sha": "22e3bd3bc410d379ded0cdd592f71059fc0aee1d",
+    "version": "v5.4.0"
   },
-  "release": "v6.3.0"
+  "release": "v6.4.0"
 }
diff --git a/README.md b/README.md
index a569e51..f2e6cbd 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ Add this dependency to your project's POM:
 <dependency>
   <groupId>com.onfido</groupId>
   <artifactId>onfido-api-java</artifactId>
-  <version>6.3.0</version>
+  <version>6.4.0</version>
   <scope>compile</scope>
 </dependency>
 ```
@@ -66,7 +66,7 @@ Add this dependency to your project's build file:
   }
 
   dependencies {
-     implementation "com.onfido:onfido-api-java:6.3.0"
+     implementation "com.onfido:onfido-api-java:6.4.0"
   }
 ```
 
@@ -80,10 +80,10 @@ mvn clean package
 
 Then manually install the following JARs:
 
-- `target/onfido-api-java-6.3.0.jar`
+- `target/onfido-api-java-6.4.0.jar`
 - `target/lib/*.jar`
 
-The latest version can be found at <https://search.maven.org/artifact/com.onfido/onfido-api-java/6.3.0/jar>.
+The latest version can be found at <https://search.maven.org/artifact/com.onfido/onfido-api-java/6.4.0/jar>.
 
 ## Getting Started
 
diff --git a/build.gradle b/build.gradle
index 3707aed..eab47e6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ apply plugin: 'java'
 apply plugin: 'com.diffplug.spotless'
 
 group = 'com.onfido'
-version = '6.3.0'
+version = '6.4.0'
 
 buildscript {
     repositories {
diff --git a/build.sbt b/build.sbt
index 7a97696..5b42480 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ lazy val root = (project in file(".")).
   settings(
     organization := "com.onfido",
     name := "onfido-api-java",
-    version := "6.3.0",
+    version := "6.4.0",
     scalaVersion := "2.11.4",
     scalacOptions ++= Seq("-feature"),
     javacOptions in compile ++= Seq("-Xlint:deprecation"),
diff --git a/pom.xml b/pom.xml
index 632fffb..5b2dbf4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <artifactId>onfido-api-java</artifactId>
     <packaging>jar</packaging>
     <name>onfido-api-java</name>
-    <version>6.3.0</version>
+    <version>6.4.0</version>
     <url>https://documentation.onfido.com</url>
     <description>Official Java API client library for the Onfido API</description>
     <scm>
@@ -338,7 +338,7 @@
         <gson-fire-version>1.9.0</gson-fire-version>
         <okhttp-version>4.12.0</okhttp-version>
         <gson-version>2.10.1</gson-version>
-        <commons-lang3-version>3.18.0</commons-lang3-version>
+        <commons-lang3-version>3.17.0</commons-lang3-version>
         <jackson-databind-nullable-version>0.2.6</jackson-databind-nullable-version>
         <jakarta-annotation-version>1.3.5</jakarta-annotation-version>
         <beanvalidation-version>2.0.2</beanvalidation-version>
diff --git a/src/main/java/com/onfido/ApiClient.java b/src/main/java/com/onfido/ApiClient.java
index 9371a19..9ff16f7 100644
--- a/src/main/java/com/onfido/ApiClient.java
+++ b/src/main/java/com/onfido/ApiClient.java
@@ -162,7 +162,7 @@ private void init() {
         json = new JSON();
 
         // Set default User-Agent.
-        setUserAgent("onfido-java/6.3.0");
+        setUserAgent("onfido-java/6.4.0");
 
         authentications = new HashMap<String, Authentication>();
     }
diff --git a/src/main/java/com/onfido/Configuration.java b/src/main/java/com/onfido/Configuration.java
index ed17c57..3170de0 100644
--- a/src/main/java/com/onfido/Configuration.java
+++ b/src/main/java/com/onfido/Configuration.java
@@ -15,7 +15,7 @@
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen", comments = "Generator version: 7.11.0")
 public class Configuration {
-    public static final String VERSION = "6.3.0";
+    public static final String VERSION = "6.4.0";
 
     private static ApiClient defaultApiClient = new ApiClient();
 
diff --git a/src/main/java/com/onfido/api/DefaultApi.java b/src/main/java/com/onfido/api/DefaultApi.java
index 9873fe8..6ba0aa8 100644
--- a/src/main/java/com/onfido/api/DefaultApi.java
+++ b/src/main/java/com/onfido/api/DefaultApi.java
@@ -1565,6 +1565,158 @@ public okhttp3.Call deleteWebhookAsync(UUID webhookId, final ApiCallback<Void> _
         localVarApiClient.executeAsync(localVarCall, _callback);
         return localVarCall;
     }
+    /**
+     * Build call for downloadAesDocument
+     * @param workflowRunId The unique identifier of the Workflow Run for which you want to retrieve the signed document. (required)
+     * @param id The unique identifier of the file which you want to retrieve. (required)
+     * @param _callback Callback for upload/download progress
+     * @return Call to execute
+     * @throws ApiException If fail to serialize the request body object
+     * @http.response.details
+     <table border="1">
+       <caption>Response Details</caption>
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 302 </td><td> Found </td><td>  * Location - Link to the Timeline File. <br>  </td></tr>
+        <tr><td> 200 </td><td> The signed document PDF binary data. </td><td>  -  </td></tr>
+        <tr><td> 0 </td><td> Unexpected error </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call downloadAesDocumentCall(UUID workflowRunId, UUID id, final ApiCallback _callback) throws ApiException {
+        String basePath = null;
+        // Operation Servers
+        String[] localBasePaths = new String[] {  };
+
+        // Determine Base Path to Use
+        if (localCustomBaseUrl != null){
+            basePath = localCustomBaseUrl;
+        } else if ( localBasePaths.length > 0 ) {
+            basePath = localBasePaths[localHostIndex];
+        } else {
+            basePath = null;
+        }
+
+        Object localVarPostBody = null;
+
+        // create path and map variables
+        String localVarPath = "/advanced_electronic_signature/documents";
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+        Map<String, String> localVarCookieParams = new HashMap<String, String>();
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        if (workflowRunId != null) {
+            localVarQueryParams.addAll(localVarApiClient.parameterToPair("workflow_run_id", workflowRunId));
+        }
+
+        if (id != null) {
+            localVarQueryParams.addAll(localVarApiClient.parameterToPair("id", id));
+        }
+
+        final String[] localVarAccepts = {
+            "application/pdf",
+            "application/json"
+        };
+        final String localVarAccept = localVarApiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) {
+            localVarHeaderParams.put("Accept", localVarAccept);
+        }
+
+        final String[] localVarContentTypes = {
+        };
+        final String localVarContentType = localVarApiClient.selectHeaderContentType(localVarContentTypes);
+        if (localVarContentType != null) {
+            localVarHeaderParams.put("Content-Type", localVarContentType);
+        }
+
+        String[] localVarAuthNames = new String[] { "Token" };
+        return localVarApiClient.buildCall(basePath, localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAuthNames, _callback);
+    }
+
+    @SuppressWarnings("rawtypes")
+    private okhttp3.Call downloadAesDocumentValidateBeforeCall(UUID workflowRunId, UUID id, final ApiCallback _callback) throws ApiException {
+        // verify the required parameter 'workflowRunId' is set
+        if (workflowRunId == null) {
+            throw new ApiException("Missing the required parameter 'workflowRunId' when calling downloadAesDocument(Async)");
+        }
+
+        // verify the required parameter 'id' is set
+        if (id == null) {
+            throw new ApiException("Missing the required parameter 'id' when calling downloadAesDocument(Async)");
+        }
+
+        return downloadAesDocumentCall(workflowRunId, id, _callback);
+
+    }
+
+    /**
+     * Retrieves the signed document or signing transaction receipt
+     * Retrieves the signed document or signing transaction receipt depending on the id provided. 
+     * @param workflowRunId The unique identifier of the Workflow Run for which you want to retrieve the signed document. (required)
+     * @param id The unique identifier of the file which you want to retrieve. (required)
+     * @return FileTransfer
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table border="1">
+       <caption>Response Details</caption>
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 302 </td><td> Found </td><td>  * Location - Link to the Timeline File. <br>  </td></tr>
+        <tr><td> 200 </td><td> The signed document PDF binary data. </td><td>  -  </td></tr>
+        <tr><td> 0 </td><td> Unexpected error </td><td>  -  </td></tr>
+     </table>
+     */
+    public FileTransfer downloadAesDocument(UUID workflowRunId, UUID id) throws ApiException {
+        ApiResponse<FileTransfer> localVarResp = downloadAesDocumentWithHttpInfo(workflowRunId, id);
+        return localVarResp.getData();
+    }
+
+    /**
+     * Retrieves the signed document or signing transaction receipt
+     * Retrieves the signed document or signing transaction receipt depending on the id provided. 
+     * @param workflowRunId The unique identifier of the Workflow Run for which you want to retrieve the signed document. (required)
+     * @param id The unique identifier of the file which you want to retrieve. (required)
+     * @return ApiResponse&lt;FileTransfer&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table border="1">
+       <caption>Response Details</caption>
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 302 </td><td> Found </td><td>  * Location - Link to the Timeline File. <br>  </td></tr>
+        <tr><td> 200 </td><td> The signed document PDF binary data. </td><td>  -  </td></tr>
+        <tr><td> 0 </td><td> Unexpected error </td><td>  -  </td></tr>
+     </table>
+     */
+    public ApiResponse<FileTransfer> downloadAesDocumentWithHttpInfo(UUID workflowRunId, UUID id) throws ApiException {
+        okhttp3.Call localVarCall = downloadAesDocumentValidateBeforeCall(workflowRunId, id, null);
+        Type localVarReturnType = new TypeToken<FileTransfer>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Retrieves the signed document or signing transaction receipt (asynchronously)
+     * Retrieves the signed document or signing transaction receipt depending on the id provided. 
+     * @param workflowRunId The unique identifier of the Workflow Run for which you want to retrieve the signed document. (required)
+     * @param id The unique identifier of the file which you want to retrieve. (required)
+     * @param _callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     * @http.response.details
+     <table border="1">
+       <caption>Response Details</caption>
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 302 </td><td> Found </td><td>  * Location - Link to the Timeline File. <br>  </td></tr>
+        <tr><td> 200 </td><td> The signed document PDF binary data. </td><td>  -  </td></tr>
+        <tr><td> 0 </td><td> Unexpected error </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call downloadAesDocumentAsync(UUID workflowRunId, UUID id, final ApiCallback<FileTransfer> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = downloadAesDocumentValidateBeforeCall(workflowRunId, id, _callback);
+        Type localVarReturnType = new TypeToken<FileTransfer>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
     /**
      * Build call for downloadCheck
      * @param checkId  (required)