diff --git a/docs/RepositoryApi.md b/docs/RepositoryApi.md
index 43f7f65..8a7cae2 100644
--- a/docs/RepositoryApi.md
+++ b/docs/RepositoryApi.md
@@ -4647,10 +4647,12 @@ Name | Type | Description  | Notes
 
 <a name="repoCompareDiff"></a>
 # **repoCompareDiff**
-> Compare repoCompareDiff(owner, repo, basehead)
+> Compare repoCompareDiff(owner, repo, basehead, output)
 
 Get commit comparison information
 
+By default returns JSON commit comparison information. The raw diff or patch can be requested with the &#x60;output&#x60; query parameter set to &#x60;diff&#x60; or &#x60;patch&#x60; respectively. 
+
 ### Example
 ```java
 // Import classes:
@@ -4705,9 +4707,10 @@ Token.setApiKey("YOUR API KEY");
 RepositoryApi apiInstance = new RepositoryApi();
 String owner = "owner_example"; // String | owner of the repo
 String repo = "repo_example"; // String | name of the repo
-String basehead = "basehead_example"; // String | compare two branches or commits
+String basehead = "basehead_example"; // String | compare two refs as `base...head` (or `base..head`); refs may be branches, tags, full or short SHAs, including branch names that contain slashes.
+String output = "output_example"; // String | return the raw comparison as `diff` or `patch` instead of JSON
 try {
-    Compare result = apiInstance.repoCompareDiff(owner, repo, basehead);
+    Compare result = apiInstance.repoCompareDiff(owner, repo, basehead, output);
     System.out.println(result);
 } catch (ApiException e) {
     System.err.println("Exception when calling RepositoryApi#repoCompareDiff");
@@ -4721,7 +4724,8 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **owner** | **String**| owner of the repo |
  **repo** | **String**| name of the repo |
- **basehead** | **String**| compare two branches or commits |
+ **basehead** | **String**| compare two refs as &#x60;base...head&#x60; (or &#x60;base..head&#x60;); refs may be branches, tags, full or short SHAs, including branch names that contain slashes. |
+ **output** | **String**| return the raw comparison as &#x60;diff&#x60; or &#x60;patch&#x60; instead of JSON | [optional] [enum: diff, patch]
 
 ### Return type
 
@@ -4734,7 +4738,7 @@ Name | Type | Description  | Notes
 ### HTTP request headers
 
  - **Content-Type**: Not defined
- - **Accept**: application/json
+ - **Accept**: application/json, text/plain
 
 <a name="repoCreateBranch"></a>
 # **repoCreateBranch**
diff --git a/src/main/java/org/gitnex/tea4j/v2/apis/RepositoryApi.java b/src/main/java/org/gitnex/tea4j/v2/apis/RepositoryApi.java
index f43a950..3974c03 100644
--- a/src/main/java/org/gitnex/tea4j/v2/apis/RepositoryApi.java
+++ b/src/main/java/org/gitnex/tea4j/v2/apis/RepositoryApi.java
@@ -883,18 +883,25 @@ public interface RepositoryApi {
       @retrofit2.http.Path("team") String team);
 
   /**
-   * Get commit comparison information
+   * Get commit comparison information By default returns JSON commit comparison information. The
+   * raw diff or patch can be requested with the &#x60;output&#x60; query parameter set to
+   * &#x60;diff&#x60; or &#x60;patch&#x60; respectively.
    *
    * @param owner owner of the repo (required)
    * @param repo name of the repo (required)
-   * @param basehead compare two branches or commits (required)
+   * @param basehead compare two refs as &#x60;base...head&#x60; (or &#x60;base..head&#x60;); refs
+   *     may be branches, tags, full or short SHAs, including branch names that contain slashes.
+   *     (required)
+   * @param output return the raw comparison as &#x60;diff&#x60; or &#x60;patch&#x60; instead of
+   *     JSON (optional)
    * @return Call&lt;Compare&gt;
    */
   @GET("repos/{owner}/{repo}/compare/{basehead}")
   Call<Compare> repoCompareDiff(
       @retrofit2.http.Path("owner") String owner,
       @retrofit2.http.Path("repo") String repo,
-      @retrofit2.http.Path("basehead") String basehead);
+      @retrofit2.http.Path("basehead") String basehead,
+      @retrofit2.http.Query("output") String output);
 
   /**
    * Create a branch