diff --git a/app/terraform/block_external.py b/app/terraform/block_external.py
index e648b94..56de93d 100644
--- a/app/terraform/block_external.py
+++ b/app/terraform/block_external.py
@@ -35,7 +35,16 @@ class BlockExternalAutomation(BlockMirrorAutomation):
 
     def fetch(self) -> None:
         user_agent = {'User-agent': 'BypassCensorship/1.0'}
-        self._data = requests.get(app.config['EXTERNAL_CHECK_URL'], headers=user_agent, timeout=30).json()
+        if isinstance(app.config.get('EXTERNAL_CHECK_URL', []), list):
+            check_urls = app.config['EXTERNAL_CHECK_URL']
+        elif isinstance(app.config.get('EXTERNAL_CHECK_URL'), str):
+            check_urls = [app.config['EXTERNAL_CHECK_URL']]
+        else:
+            check_urls = []
+        for check_url in check_urls:
+            if self._data is None:
+                self._data = []
+            self._data.extend(requests.get(check_url, headers=user_agent, timeout=30).json())
 
     def parse(self) -> None:
         self.patterns.extend(["https://" + trim_http_https(pattern) for pattern in self._data])