diff --git a/pkg/swagger/docs.go b/pkg/swagger/docs.go
index 1f0c57fe6..7c29b58e2 100644
--- a/pkg/swagger/docs.go
+++ b/pkg/swagger/docs.go
@@ -4527,6 +4527,18 @@ const docTemplate = `{
                         "name": "attachmentID",
                         "in": "path",
                         "required": true
+                    },
+                    {
+                        "type": "string",
+                        "description": "If set to true, a preview image will be returned if the attachment is an image.",
+                        "name": "preview",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "The size of the preview image. Can be sm = 100px, md = 200px, lg = 400px or xl = 800px.",
+                        "name": "size",
+                        "in": "query"
                     }
                 ],
                 "responses": {
diff --git a/pkg/swagger/swagger.json b/pkg/swagger/swagger.json
index 653edd99a..a30ca1570 100644
--- a/pkg/swagger/swagger.json
+++ b/pkg/swagger/swagger.json
@@ -4519,6 +4519,18 @@
                         "name": "attachmentID",
                         "in": "path",
                         "required": true
+                    },
+                    {
+                        "type": "string",
+                        "description": "If set to true, a preview image will be returned if the attachment is an image.",
+                        "name": "preview",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "The size of the preview image. Can be sm = 100px, md = 200px, lg = 400px or xl = 800px.",
+                        "name": "size",
+                        "in": "query"
                     }
                 ],
                 "responses": {
diff --git a/pkg/swagger/swagger.yaml b/pkg/swagger/swagger.yaml
index 63e863e9c..b472d8d8e 100644
--- a/pkg/swagger/swagger.yaml
+++ b/pkg/swagger/swagger.yaml
@@ -4629,6 +4629,16 @@ paths:
         name: attachmentID
         required: true
         type: integer
+      - description: If set to true, a preview image will be returned if the attachment
+          is an image.
+        in: query
+        name: preview
+        type: string
+      - description: The size of the preview image. Can be sm = 100px, md = 200px,
+          lg = 400px or xl = 800px.
+        in: query
+        name: size
+        type: string
       produces:
       - application/octet-stream
       responses: