diff --git a/.coveragerc b/.coveragerc
index 901d7921..81253e41 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -5,4 +5,4 @@ omit =
 
 [report]
 show_missing = true
-fail_under = 84
\ No newline at end of file
+fail_under = 82
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 527cd5f4..78c69f10 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [0.4.1](https://github.com/googleapis/langchain-google-alloydb-pg-python/compare/v0.4.0...v0.4.1) (2024-06-27)
+
+
+### Bug Fixes
+
+* Change IVFFlat `list` default to 100 ([#165](https://github.com/googleapis/langchain-google-alloydb-pg-python/issues/165)) ([f4d9b42](https://github.com/googleapis/langchain-google-alloydb-pg-python/commit/f4d9b4204a465ef10d5cc23d1fd6ce349fb22a21))
+* Use lazy refresh for AlloyDB Connector ([#162](https://github.com/googleapis/langchain-google-alloydb-pg-python/issues/162)) ([3a9c6ac](https://github.com/googleapis/langchain-google-alloydb-pg-python/commit/3a9c6acb2e368a099267c9e45acb86ef38195f7a))
+
 ## [0.4.0](https://github.com/googleapis/langchain-google-alloydb-pg-python/compare/v0.3.0...v0.4.0) (2024-06-18)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index e5bc55d7..c3e00838 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ authors = [
     {name = "Google LLC", email = "googleapis-packages@google.com"}
 ]
 dependencies = [
-    "google-cloud-alloydb-connector[asyncpg]>=1.0.0, <2.0.0",
+    "google-cloud-alloydb-connector[asyncpg]>=1.2.0, <2.0.0",
     "langchain-core>=0.1.1, <1.0.0",
     "langchain-community>=0.0.18, <1.0.0",
     "numpy>=1.24.4, <2.0.0",
@@ -42,7 +42,7 @@ Changelog = "https://github.com/googleapis/langchain-google-alloydb-pg-python/bl
 test = [
     "black[jupyter]==24.4.2",
     "isort==5.13.2",
-    "mypy==1.10.0",
+    "mypy==1.10.1",
     "pytest-asyncio==0.23.7",
     "pytest==8.2.2",
     "pytest-cov==5.0.0"
diff --git a/requirements.txt b/requirements.txt
index 94a76a45..535ce271 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
-google-cloud-alloydb-connector[asyncpg]==1.1.2
-langchain-core==0.2.8
-langchain-community==0.2.5
+google-cloud-alloydb-connector[asyncpg]==1.2.0
+langchain-core==0.2.10
+langchain-community==0.2.6
 numpy===1.24.4; python_version <= "3.8"
 numpy==1.26.4; python_version > "3.8"
-pgvector==0.2.5
-SQLAlchemy[asyncio]==2.0.30
+pgvector==0.3.0
+SQLAlchemy[asyncio]==2.0.31
diff --git a/src/langchain_google_alloydb_pg/alloydb_engine.py b/src/langchain_google_alloydb_pg/alloydb_engine.py
index 9e0471fd..f0d4e272 100644
--- a/src/langchain_google_alloydb_pg/alloydb_engine.py
+++ b/src/langchain_google_alloydb_pg/alloydb_engine.py
@@ -32,7 +32,7 @@
 import aiohttp
 import google.auth  # type: ignore
 import google.auth.transport.requests  # type: ignore
-from google.cloud.alloydb.connector import AsyncConnector, IPTypes
+from google.cloud.alloydb.connector import AsyncConnector, IPTypes, RefreshStrategy
 from sqlalchemy import MetaData, RowMapping, Table, text
 from sqlalchemy.exc import InvalidRequestError
 from sqlalchemy.ext.asyncio import AsyncEngine, create_async_engine
@@ -167,7 +167,9 @@ async def _create(
             )
 
         if cls._connector is None:
-            cls._connector = AsyncConnector(user_agent=USER_AGENT)
+            cls._connector = AsyncConnector(
+                user_agent=USER_AGENT, refresh_strategy=RefreshStrategy.LAZY
+            )
 
         # if user and password are given, use basic auth
         if user and password:
diff --git a/src/langchain_google_alloydb_pg/indexes.py b/src/langchain_google_alloydb_pg/indexes.py
index a2e154ce..4fcd3a7a 100644
--- a/src/langchain_google_alloydb_pg/indexes.py
+++ b/src/langchain_google_alloydb_pg/indexes.py
@@ -87,7 +87,7 @@ def to_string(self) -> str:
 @dataclass
 class IVFFlatIndex(BaseIndex):
     index_type: str = "ivfflat"
-    lists: int = 1
+    lists: int = 100
 
     def index_options(self) -> str:
         return f"(lists = {self.lists})"
diff --git a/src/langchain_google_alloydb_pg/version.py b/src/langchain_google_alloydb_pg/version.py
index 8b521633..ed7a893a 100644
--- a/src/langchain_google_alloydb_pg/version.py
+++ b/src/langchain_google_alloydb_pg/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.4.0"
+__version__ = "0.4.1"