diff --git a/pyproject.toml b/pyproject.toml
index e9994ebff..838bbdd4b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ dependencies = [
     "cffi==1.17.1",
     "charset-normalizer==3.4.3",
     "click==8.2.1",
-    "cloud-sql-python-connector==1.18.3",
+    "cloud-sql-python-connector==1.18.4",
     "cryptography==45.0.6",
     "dnspython==2.7.0",
     "email-validator==2.2.0",
diff --git a/uv.lock b/uv.lock
index b75cbba34..631028d33 100644
--- a/uv.lock
+++ b/uv.lock
@@ -313,7 +313,7 @@ wheels = [
 
 [[package]]
 name = "cloud-sql-python-connector"
-version = "1.18.3"
+version = "1.18.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "aiofiles" },
@@ -323,9 +323,9 @@ dependencies = [
     { name = "google-auth" },
     { name = "requests" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/b6/4f/97498f9ac19c80801a4c6a007b857bad3f50f671a0a486c669c98372e74f/cloud_sql_python_connector-1.18.3.tar.gz", hash = "sha256:1c50bfbcdf27f19be0389f0c088791c0cb8fdf8581974291dc3b155bb97f49cc", size = 42669, upload-time = "2025-07-11T22:09:28.925Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/f7/b8/575145a7b58b57dfb347f4397a23efaf14001ff2d37d4ca71f1bcfc52881/cloud_sql_python_connector-1.18.4.tar.gz", hash = "sha256:dd2b015245d77771b5e7566e2817e279e9daca90e0cf30dac032155e813afe76", size = 42652, upload-time = "2025-08-12T21:27:30.386Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/3c/bd/f8a05c5380d428c8cf9d8aeb8ed449d8f70b10bd218d0ee1d48f41586227/cloud_sql_python_connector-1.18.3-py3-none-any.whl", hash = "sha256:4f0f7722ee5de26c0322589038c6aa5839f40a23cd57ac4cadde231da5ba3ba4", size = 49276, upload-time = "2025-07-11T22:09:27.766Z" },
+    { url = "https://files.pythonhosted.org/packages/00/45/ad1e5b214037e5ec095e8b3b2082d61653f10b862b9542a99f993d31f8b4/cloud_sql_python_connector-1.18.4-py3-none-any.whl", hash = "sha256:0a77a16ab2d93fc78d8593175cb69fedfbc1c67aa99f9b3ba70b5026343db092", size = 49276, upload-time = "2025-08-12T21:27:29.054Z" },
 ]
 
 [[package]]
@@ -990,7 +990,7 @@ requires-dist = [
     { name = "cffi", specifier = "==1.17.1" },
     { name = "charset-normalizer", specifier = "==3.4.3" },
     { name = "click", specifier = "==8.2.1" },
-    { name = "cloud-sql-python-connector", specifier = "==1.18.3" },
+    { name = "cloud-sql-python-connector", specifier = "==1.18.4" },
     { name = "cryptography", specifier = "==45.0.6" },
     { name = "dnspython", specifier = "==2.7.0" },
     { name = "email-validator", specifier = "==2.2.0" },