diff --git a/libs/langchain/langchain/vectorstores/pgvector.py b/libs/langchain/langchain/vectorstores/pgvector.py
index 6e6bdcead7e..41deb51f10a 100644
--- a/libs/langchain/langchain/vectorstores/pgvector.py
+++ b/libs/langchain/langchain/vectorstores/pgvector.py
@@ -147,6 +147,10 @@ class PGVector(VectorStore):
         self.create_tables_if_not_exists()
         self.create_collection()
 
+    def __del__(self) -> None:
+        if self._conn:
+            self._conn.close()
+
     @property
     def embeddings(self) -> Embeddings:
         return self.embedding_function