diff --git a/endpoints/get_blocks.py b/endpoints/get_blocks.py
index a1fd50c..5b1fd38 100644
--- a/endpoints/get_blocks.py
+++ b/endpoints/get_blocks.py
@@ -1,4 +1,5 @@
 # encoding: utf-8
+import os
 from typing import List
 
 from fastapi import Query, Path, HTTPException