diff --git a/src/second_brain/embeddings/__init__.py b/src/second_brain/embeddings/__init__.py
index 61b43b9..c11ea5d 100644
--- a/src/second_brain/embeddings/__init__.py
+++ b/src/second_brain/embeddings/__init__.py
@@ -23,6 +23,7 @@ index, not authoritative state.
 
 from __future__ import annotations
 
+import atexit
 import logging
 import os
 from typing import Any
@@ -73,6 +74,11 @@ def _get_pool() -> ConnectionPool | None:
     if not dsn:
         return None
     _pool = ConnectionPool(dsn, min_size=1, max_size=4, open=True, timeout=10)
+    # Make sure the pool's worker threads get a clean shutdown when the
+    # interpreter exits; without this psycopg_pool prints
+    # "couldn't stop thread pool-1-worker-N within 5.0 seconds" on every
+    # `second-brain process` run.
+    atexit.register(close_pool)
     return _pool