diff --git a/pyproject.toml b/pyproject.toml
index 277165c..35e9af0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ license = "MIT"
 dependencies = [
     "asyncpg>=0.30.0",
     "langchain-core>=1.2.11,<2.0",
-    "pgvector>=0.2.5,<0.4",
+    "pgvector>=0.2.5,<0.5",
     "psycopg[binary]>=3,<4",
     "psycopg-pool>=3.2.1,<4",
     "sqlalchemy[asyncio]>=2,<3",
diff --git a/uv.lock b/uv.lock
index 9e759b6..f8a9bff 100644
--- a/uv.lock
+++ b/uv.lock
@@ -601,7 +601,7 @@ requires-dist = [
     { name = "asyncpg", specifier = ">=0.30.0" },
     { name = "langchain-core", specifier = ">=1.2.11,<2.0" },
     { name = "numpy", specifier = ">=1.21,<3" },
-    { name = "pgvector", specifier = ">=0.2.5,<0.4" },
+    { name = "pgvector", specifier = ">=0.2.5,<0.5" },
     { name = "psycopg", extras = ["binary"], specifier = ">=3,<4" },
     { name = "psycopg-pool", specifier = ">=3.2.1,<4" },
     { name = "sqlalchemy", extras = ["asyncio"], specifier = ">=2,<3" },
@@ -962,15 +962,15 @@ wheels = [
 
 [[package]]
 name = "pgvector"
-version = "0.3.6"
+version = "0.4.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "numpy", version = "1.26.4", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.11'" },
     { name = "numpy", version = "2.3.4", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.11'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/7d/d8/fd6009cee3e03214667df488cdcf9609461d729968da94e4f95d6359d304/pgvector-0.3.6.tar.gz", hash = "sha256:31d01690e6ea26cea8a633cde5f0f55f5b246d9c8292d68efdef8c22ec994ade", size = 25421, upload-time = "2024-10-27T00:15:09.632Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/25/6c/6d8b4b03b958c02fa8687ec6063c49d952a189f8c91ebbe51e877dfab8f7/pgvector-0.4.2.tar.gz", hash = "sha256:322cac0c1dc5d41c9ecf782bd9991b7966685dee3a00bc873631391ed949513a", size = 31354, upload-time = "2025-12-05T01:07:17.87Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/fb/81/f457d6d361e04d061bef413749a6e1ab04d98cfeec6d8abcfe40184750f3/pgvector-0.3.6-py3-none-any.whl", hash = "sha256:f6c269b3c110ccb7496bac87202148ed18f34b390a0189c783e351062400a75a", size = 24880, upload-time = "2024-10-27T00:15:08.045Z" },
+    { url = "https://files.pythonhosted.org/packages/5a/26/6cee8a1ce8c43625ec561aff19df07f9776b7525d9002c86bceb3e0ac970/pgvector-0.4.2-py3-none-any.whl", hash = "sha256:549d45f7a18593783d5eec609ea1684a724ba8405c4cb182a0b2b08aeff04e08", size = 27441, upload-time = "2025-12-05T01:07:16.536Z" },
 ]
 
 [[package]]