diff --git a/openapi/swagger.json b/openapi/swagger.json
index cd6706f..fd19055 100644
--- a/openapi/swagger.json
+++ b/openapi/swagger.json
@@ -649,6 +649,15 @@
           }
         },
         "parameters": [
+          {
+            "name": "If-Match",
+            "in": "header",
+            "schema": {
+              "type": "string",
+              "description": "ETag of the current table version. If provided, the request will fail if the table has been updated since this version."
+            },
+            "required": false
+          },
           {
             "name": "tableID",
             "in": "path",