diff --git a/pyproject.toml b/pyproject.toml
index 26f233c..34303a5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ dependencies = [
     "sqlalchemy[asyncio]>=2.0.51,<3",
     "asyncpg>=0.31.0,<1",
     "alembic>=1.18.5,<2",
-    "pgvector>=0.4.2,<1",
+    "pgvector>=0.5.0,<1",
     "tiktoken>=0.13.0,<1",
     "structlog>=26.1.0,<27",
     "pyyaml>=6.0.3,<7",