diff --git a/api/core/tools/utils/parser.py b/api/core/tools/utils/parser.py
index 57282f0013..aabd0bb9a1 100644
--- a/api/core/tools/utils/parser.py
+++ b/api/core/tools/utils/parser.py
@@ -170,7 +170,7 @@ class ApiBasedToolSchemaParser:
             return ToolParameter.ToolParameterType.NUMBER
         elif typ == "boolean":
             return ToolParameter.ToolParameterType.BOOLEAN
-        elif typ == 'object':
+        elif typ == "object":
             return ToolParameter.ToolParameterType.OBJECT
         elif typ == "string":
             return ToolParameter.ToolParameterType.STRING