diff --git a/bard/bard.py b/bard/bard.py
index a4510f4..cc03b32 100644
--- a/bard/bard.py
+++ b/bard/bard.py
@@ -40,8 +40,9 @@ async def _get_session(self, force_close: bool = False) -> ClientSession:
             "__Secure-1PSIDTS": self.secure_1psidts,
         }
 
-        if self.session and force_close:
+        if self.session and not self.session.closed and force_close:
             await self.session.close()
+            self.session = None
 
         if not self.session:
             self.session = ClientSession(
@@ -144,6 +145,7 @@ async def close_conversation(self) -> None:
         """
         if self.session and not self.session.closed:
             await self.session.close()
+            self.session = None
 
         self.conversation_id = None
         self.response_id = None