diff --git a/README.md b/README.md
index 2d312fc..d10e63e 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # java-gitea-api
 
 Gitea API.
-- API version: 1.26.0
+- API version: 1.21.4
 
 This documentation describes the Gitea API.
 
@@ -39,7 +39,7 @@ Add this dependency to your project's POM:
 <dependency>
   <groupId>io.github.le-shi</groupId>
   <artifactId>java-gitea-api</artifactId>
-  <version>1.26.0</version>
+  <version>1.21.4</version>
   <scope>compile</scope>
 </dependency>
 ```
@@ -49,7 +49,7 @@ Add this dependency to your project's POM:
 Add this dependency to your project's build file:
 
 ```groovy
-implementation "io.github.le-shi:java-gitea-api:1.26.0"
+implementation "io.github.le-shi:java-gitea-api:1.21.4"
 ```
 
 ### Others
@@ -62,5 +62,5 @@ mvn clean package
 
 Then manually install the following JARs:
 
-* `target/java-gitea-api-1.26.0.jar`
+* `target/java-gitea-api-1.21.4.jar`
 * `target/lib/*.jar`
diff --git a/pom.xml b/pom.xml
index 4ac19bc..260c22f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <artifactId>java-gitea-api</artifactId>
     <packaging>jar</packaging>
     <name>java-gitea-api</name>
-    <version>1.26.0</version>
+    <version>1.21.4</version>
     <url>https://github.com/le-shi/java-gitea-api</url>
     <description>Swagger Java Client for Gitea</description>
     <scm>
@@ -62,7 +62,7 @@
                         <hideGenerationTimestamp>true</hideGenerationTimestamp>
                         <artifactId>java-gitea-api</artifactId>
                         <groupId>io.github.le-shi</groupId>
-                        <artifactVersion>${project.version}</artifactVersion>
+                        <artifactVersion>1.21.4</artifactVersion>
                     </configOptions>
                 </configuration>
             </plugin>
diff --git a/swagger.v1.json b/swagger.v1.json
index 3f741f4..a05fe9e 100644
--- a/swagger.v1.json
+++ b/swagger.v1.json
@@ -19,7 +19,7 @@
       "name": "MIT",
       "url": "http://opensource.org/licenses/MIT"
     },
-    "version": "1.21.1"
+    "version": "1.21.4"
   },
   "basePath": "/api/v1",
   "paths": {
@@ -660,6 +660,9 @@
           "200": {
             "$ref": "#/responses/User"
           },
+          "400": {
+            "$ref": "#/responses/error"
+          },
           "403": {
             "$ref": "#/responses/forbidden"
           },
@@ -18328,8 +18331,7 @@
       "type": "object",
       "required": [
         "username",
-        "email",
-        "password"
+        "email"
       ],
       "properties": {
         "created_at": {
@@ -23955,6 +23957,7 @@
   },
   "securityDefinitions": {
     "AccessToken": {
+      "description": "This authentication option is deprecated for removal in Gitea 1.23. Please use AuthorizationHeaderToken instead.",
       "type": "apiKey",
       "name": "access_token",
       "in": "query"
@@ -23987,6 +23990,7 @@
       "in": "header"
     },
     "Token": {
+      "description": "This authentication option is deprecated for removal in Gitea 1.23. Please use AuthorizationHeaderToken instead.",
       "type": "apiKey",
       "name": "token",
       "in": "query"