diff --git a/backend/docs/docs.go b/backend/docs/docs.go
index 362d3f9..6850940 100644
--- a/backend/docs/docs.go
+++ b/backend/docs/docs.go
@@ -141,7 +141,10 @@ const docTemplate = `{
                 ],
                 "responses": {
                     "200": {
-                        "description": "desc"
+                        "description": "Account is created and awaiting verification"
+                    },
+                    "409": {
+                        "description": "Username or email is already taken"
                     }
                 }
             }
@@ -362,13 +365,10 @@ const docTemplate = `{
                     "type": "string"
                 },
                 "password": {
-                    "description": "TODO: password checking",
                     "type": "string"
                 },
                 "username": {
-                    "type": "string",
-                    "maxLength": 20,
-                    "minLength": 3
+                    "type": "string"
                 }
             }
         },
@@ -380,21 +380,14 @@ const docTemplate = `{
                 "verification_code"
             ],
             "properties": {
-                "avatar_url": {
-                    "type": "string",
-                    "maxLength": 255
-                },
                 "birthday": {
                     "type": "string"
                 },
                 "name": {
-                    "type": "string",
-                    "maxLength": 75
+                    "type": "string"
                 },
                 "username": {
-                    "type": "string",
-                    "maxLength": 20,
-                    "minLength": 3
+                    "type": "string"
                 },
                 "verification_code": {
                     "type": "string"
diff --git a/backend/docs/swagger.json b/backend/docs/swagger.json
index 7e283e8..607e8de 100644
--- a/backend/docs/swagger.json
+++ b/backend/docs/swagger.json
@@ -137,7 +137,10 @@
                 ],
                 "responses": {
                     "200": {
-                        "description": "desc"
+                        "description": "Account is created and awaiting verification"
+                    },
+                    "409": {
+                        "description": "Username or email is already taken"
                     }
                 }
             }
@@ -358,13 +361,10 @@
                     "type": "string"
                 },
                 "password": {
-                    "description": "TODO: password checking",
                     "type": "string"
                 },
                 "username": {
-                    "type": "string",
-                    "maxLength": 20,
-                    "minLength": 3
+                    "type": "string"
                 }
             }
         },
@@ -376,21 +376,14 @@
                 "verification_code"
             ],
             "properties": {
-                "avatar_url": {
-                    "type": "string",
-                    "maxLength": 255
-                },
                 "birthday": {
                     "type": "string"
                 },
                 "name": {
-                    "type": "string",
-                    "maxLength": 75
+                    "type": "string"
                 },
                 "username": {
-                    "type": "string",
-                    "maxLength": 20,
-                    "minLength": 3
+                    "type": "string"
                 },
                 "verification_code": {
                     "type": "string"
diff --git a/backend/docs/swagger.yaml b/backend/docs/swagger.yaml
index 1ca5665..808a772 100644
--- a/backend/docs/swagger.yaml
+++ b/backend/docs/swagger.yaml
@@ -32,11 +32,8 @@ definitions:
       email:
         type: string
       password:
-        description: 'TODO: password checking'
         type: string
       username:
-        maxLength: 20
-        minLength: 3
         type: string
     required:
     - password
@@ -44,17 +41,11 @@ definitions:
     type: object
   models.RegistrationCompleteRequest:
     properties:
-      avatar_url:
-        maxLength: 255
-        type: string
       birthday:
         type: string
       name:
-        maxLength: 75
         type: string
       username:
-        maxLength: 20
-        minLength: 3
         type: string
       verification_code:
         type: string
@@ -157,7 +148,9 @@ paths:
       - application/json
       responses:
         "200":
-          description: desc
+          description: Account is created and awaiting verification
+        "409":
+          description: Username or email is already taken
       summary: Register an account
       tags:
       - Auth