diff --git a/argos/agent.py b/argos/agent.py
index fe3d222..7cc3209 100644
--- a/argos/agent.py
+++ b/argos/agent.py
@@ -39,15 +39,16 @@ class ArgosAgent:
         self.max_tasks = max_tasks
         self.wait_time = wait_time
         self.auth = auth
-        headers = {
-            "Authorization": f"Bearer {self.auth}",
-        }
-        self._http_client = httpx.AsyncClient(headers=headers)
+        self._http_client = None
 
         self.agent_id = socket.gethostname()
 
     @retry(after=log_failure, wait=wait_random(min=1, max=2))
     async def run(self):
+        headers = {
+            "Authorization": f"Bearer {self.auth}",
+        }
+        self._http_client = httpx.AsyncClient(headers=headers)
         logger.info("Running agent against %s", self.server)
         async with self._http_client:
             while "forever":