diff --git a/docs/swagger.yaml b/docs/swagger.yaml
index a915e3084..d516872b4 100644
--- a/docs/swagger.yaml
+++ b/docs/swagger.yaml
@@ -1309,41 +1309,7 @@ paths:
         403:
           description: User does not have permission of admin role.
         500:
-          description: Unexpected internal errors.
-  /systeminfo/volumes:
-    get:
-      summary: Get system volume info (total/free size).
-      description: |
-        This endpoint is for retrieving system volume info that only provides for admin user.
-      tags:
-        - Products
-      responses:
-        200:
-          description: Get system volumes successfully.
-        401:
-          description: User need to log in first.
-        403:
-          description: User does not have permission of admin role.
-        500:
-          description: Unexpected internal errors.
-  /systeminfo/getcert:
-    get:
-      summary: Get default root certificate under OVA deployment.
-      description: |
-        This endpoint is for downloading a default root certificate that only provides for admin user under OVA deployment.
-      tags:
-        - Products
-      responses:
-        200:
-          description: Get default root certificate successfully.
-        401:
-          description: User need to log in first.
-        403:
-          description: User does not have permission of admin role.
-        404:
-          description: Not found the default root certificate.
-        500:
-          description: Unexpected internal errors.
+          description: Unexpected internal errors.   		
 definitions:
   Search:
     type: object
@@ -1775,22 +1741,3 @@ definitions:
       comment:
         type: string
         description: The new comment.
-  Storage:
-    type: object
-    properties:
-      total: 
-        type: integer
-        format: int64
-        description: Total volume size.
-      free:
-        type: integer
-        format: int64
-        description: Free volume size.
-  SystemInfo:
-    type: object
-    properties:
-      storage: 
-        type: array
-        description: The storage of system.
-        items:
-          $ref: '#/definitions/Storage'
\ No newline at end of file
diff --git a/src/ui/api/systeminfo.go b/src/ui/api/systeminfo.go
index 8afedc00f..0310409e2 100644
--- a/src/ui/api/systeminfo.go
+++ b/src/ui/api/systeminfo.go
@@ -73,7 +73,6 @@ func (sia *SystemInfoAPI) GetVolumeInfo() {
 func (sia *SystemInfoAPI) GetCert() {
 	if sia.isAdmin {
 		if _, err := os.Stat(defaultRootCert); !os.IsNotExist(err) {
-			sia.Ctx.Output.Header("Content-Type", "application/octet-stream")
 			sia.Ctx.Output.Header("Content-Disposition", "attachment; filename=ca.crt")
 			http.ServeFile(sia.Ctx.ResponseWriter, sia.Ctx.Request, defaultRootCert)
 		} else {
@@ -81,5 +80,5 @@ func (sia *SystemInfoAPI) GetCert() {
 			sia.CustomAbort(http.StatusNotFound, "No certificate found.")
 		}
 	}
-	sia.CustomAbort(http.StatusForbidden, "")
+	sia.CustomAbort(http.StatusUnauthorized, "")
 }