diff --git a/dbt/adapters/databricks/__version__.py b/dbt/adapters/databricks/__version__.py
index ccbf2589..339a42e9 100644
--- a/dbt/adapters/databricks/__version__.py
+++ b/dbt/adapters/databricks/__version__.py
@@ -1 +1 @@
-version = "1.9.0rc5"
+version = "1.9.0rc6"
diff --git a/dev-requirements.txt b/dev-requirements.txt
deleted file mode 100644
index d80f641d..00000000
--- a/dev-requirements.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-ruff
-freezegun~=1.5.0
-ipdb
-mock>=1.3.0
-mypy==1.1.1
-pytest-csv
-pytest-dotenv
-pytest-xdist
-pytest>=6.0.2
-pytz
-tox>=3.2.0
-types-requests
-types-mock
-
-git+https://github.com/dbt-labs/dbt-adapters.git@main#subdirectory=dbt-tests-adapter
diff --git a/pyproject.toml b/pyproject.toml
index a21c8a99..ab70bd20 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,8 +26,8 @@ dependencies = [
     "databricks-sql-connector>=3.5.0, <4.0.0",
     "dbt-adapters>=1.10.3, <2.0",
     "dbt-common>=1.13.0, <2.0",
-    "dbt-core>=1.9.0rc2, <2.0",
-    "dbt-spark>=1.9.0b1, <2.0",
+    "dbt-core>=1.8.7, <2.0",
+    "dbt-spark>=1.8.0, <2.0",
     "keyring>=23.13.0",
     "pydantic>=1.10.0, <2",
 ]
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index b5199830..00000000
--- a/requirements.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-databricks-sql-connector>=3.5.0, <4.0
-git+https://github.com/dbt-labs/dbt-adapters.git@main
-git+https://github.com/dbt-labs/dbt-common.git@main
-git+https://github.com/dbt-labs/dbt-core.git@main#subdirectory=core
-git+https://github.com/dbt-labs/dbt-spark.git@main
-databricks-sdk==0.17.0
-keyring>=23.13.0
-pydantic>=1.10.0, <2
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 54a7be51..00000000
--- a/setup.py
+++ /dev/null
@@ -1,80 +0,0 @@
-#!/usr/bin/env python
-import os
-import sys
-
-# require python 3.9 or newer
-if sys.version_info < (3, 9):
-    print("Error: dbt does not support this version of Python.")
-    print("Please upgrade to Python 3.9 or higher.")
-    sys.exit(1)
-
-
-# require version of setuptools that supports find_namespace_packages
-from setuptools import setup
-
-try:
-    from setuptools import find_namespace_packages
-except ImportError:
-    # the user has a downlevel version of setuptools.
-    print("Error: dbt requires setuptools v40.1.0 or higher.")
-    print('Please upgrade setuptools with "pip install --upgrade setuptools" and try again')
-    sys.exit(1)
-
-
-# pull long description from README
-this_directory = os.path.abspath(os.path.dirname(__file__))
-with open(os.path.join(this_directory, "README.md"), "r", encoding="utf8") as f:
-    long_description = f.read()
-
-
-# get this package's version from dbt/adapters/<name>/__version__.py
-def _get_plugin_version() -> str:
-    _version_path = os.path.join(this_directory, "dbt", "adapters", "databricks", "__version__.py")
-    try:
-        exec(open(_version_path).read())
-        return locals()["version"]
-    except IOError:
-        print("Failed to load dbt-databricks version file for packaging.", file=sys.stderr)
-        sys.exit(-1)
-
-
-package_name = "dbt-databricks"
-package_version = _get_plugin_version()
-description = """The Databricks adapter plugin for dbt"""
-
-setup(
-    name=package_name,
-    version=package_version,
-    description=description,
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    author="Databricks",
-    author_email="feedback@databricks.com",
-    url="https://github.com/databricks/dbt-databricks",
-    packages=find_namespace_packages(include=["dbt", "dbt.*"]),
-    include_package_data=True,
-    install_requires=[
-        "dbt-spark>=1.8.0, <2.0",
-        "dbt-core>=1.8.7, <2.0",
-        "dbt-adapters>=1.7.0, <2.0",
-        "dbt-common>=1.10.0, <2.0",
-        "databricks-sql-connector>=3.5.0, <4.0.0",
-        "databricks-sdk==0.17.0",
-        "keyring>=23.13.0",
-        "pandas<2.2.0",
-        "pydantic>=1.10.0, <2",
-    ],
-    zip_safe=False,
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "License :: OSI Approved :: Apache Software License",
-        "Operating System :: Microsoft :: Windows",
-        "Operating System :: MacOS :: MacOS X",
-        "Operating System :: POSIX :: Linux",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.11",
-        "Programming Language :: Python :: 3.12",
-    ],
-    python_requires=">=3.9",
-)