diff --git a/poetry.lock b/poetry.lock
index 3c1caad..834f712 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -203,6 +203,17 @@ python-versions = "*"
 flake8 = ">=3"
 pydocstyle = ">=2.1"
 
+[[package]]
+name = "greenlet"
+version = "1.1.2"
+description = "Lightweight in-process concurrent programming"
+category = "main"
+optional = false
+python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
+
+[package.extras]
+docs = ["sphinx"]
+
 [[package]]
 name = "idna"
 version = "3.3"
@@ -589,7 +600,7 @@ python-versions = "*"
 
 [[package]]
 name = "singer-sdk"
-version = "0.3.18"
+version = "0.4.0"
 description = "A framework for building Singer taps"
 category = "main"
 optional = false
@@ -610,6 +621,7 @@ pendulum = ">=2.1.0,<3.0.0"
 pipelinewise-singer-python = "1.2.0"
 PyJWT = "1.7.1"
 requests = ">=2.25.1,<3.0.0"
+sqlalchemy = ">=1.4,<2.0"
 
 [package.extras]
 docs = ["sphinx (>=3.5.4,<4.0.0)", "sphinx-rtd-theme (>=0.5.2,<0.6.0)", "sphinx-copybutton (>=0.3.1,<0.4.0)", "myst-parser (>=0.14.0,<0.15.0)"]
@@ -630,6 +642,39 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "sqlalchemy"
+version = "1.4.31"
+description = "Database Abstraction Library"
+category = "main"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,>=2.7"
+
+[package.dependencies]
+greenlet = {version = "!=0.4.17", markers = "python_version >= \"3\" and (platform_machine == \"aarch64\" or platform_machine == \"ppc64le\" or platform_machine == \"x86_64\" or platform_machine == \"amd64\" or platform_machine == \"AMD64\" or platform_machine == \"win32\" or platform_machine == \"WIN32\")"}
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+
+[package.extras]
+aiomysql = ["greenlet (!=0.4.17)", "aiomysql"]
+aiosqlite = ["typing_extensions (!=3.10.0.1)", "greenlet (!=0.4.17)", "aiosqlite"]
+asyncio = ["greenlet (!=0.4.17)"]
+asyncmy = ["greenlet (!=0.4.17)", "asyncmy (>=0.2.3)"]
+mariadb_connector = ["mariadb (>=1.0.1)"]
+mssql = ["pyodbc"]
+mssql_pymssql = ["pymssql"]
+mssql_pyodbc = ["pyodbc"]
+mypy = ["sqlalchemy2-stubs", "mypy (>=0.910)"]
+mysql = ["mysqlclient (>=1.4.0,<2)", "mysqlclient (>=1.4.0)"]
+mysql_connector = ["mysql-connector-python"]
+oracle = ["cx_oracle (>=7,<8)", "cx_oracle (>=7)"]
+postgresql = ["psycopg2 (>=2.7)"]
+postgresql_asyncpg = ["greenlet (!=0.4.17)", "asyncpg"]
+postgresql_pg8000 = ["pg8000 (>=1.16.6)"]
+postgresql_psycopg2binary = ["psycopg2-binary"]
+postgresql_psycopg2cffi = ["psycopg2cffi"]
+pymysql = ["pymysql (<1)", "pymysql"]
+sqlcipher = ["sqlcipher3-binary"]
+
 [[package]]
 name = "tokenize-rt"
 version = "4.2.1"
@@ -698,7 +743,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytes
 [metadata]
 lock-version = "1.1"
 python-versions = "<3.11,>=3.6.2"
-content-hash = "034c18499b18e381a84edd05bef4953b3d77e99ea9059c380002efda6b796fc6"
+content-hash = "0fdf18b26b660ca0eb4f8d4c707c72b851281eed217affb83732469275c12149"
 
 [metadata.files]
 atomicwrites = [
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@@ -835,6 +882,63 @@ flake8-docstrings = [
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 ]
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 idna = [
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@@ -1044,8 +1148,8 @@ simplejson = [
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 singer-sdk = [
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@@ -1055,6 +1159,44 @@ snowballstemmer = [
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 ]
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 tokenize-rt = [
     {file = "tokenize_rt-4.2.1-py2.py3-none-any.whl", hash = "sha256:08a27fa032a81cf45e8858d0ac706004fcd523e8463415ddf1442be38e204ea8"},
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diff --git a/pyproject.toml b/pyproject.toml
index 6c3322d..77ab49b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ documentation = "https://github.com/MeltanoLabs/meltano-map-transform#readme"
 
 [tool.poetry.dependencies]
 python = "<3.11,>=3.6.2"
-singer-sdk = "0.3.18"
+singer-sdk = "0.4.0"
 
 [tool.poetry.dev-dependencies]
 black = {version = "^21.12b0", allow-prereleases = true}