diff --git a/.github/workflows/build_layer.yml b/.github/workflows/build_layer.yml
index db8329b5..1725975f 100644
--- a/.github/workflows/build_layer.yml
+++ b/.github/workflows/build_layer.yml
@@ -37,7 +37,7 @@ jobs:
       - name: Patch pyproject.toml
         run: |
           echo "Patching pyproject.toml to use latest build of dd-trace-py"
-          sed -zEi 's|^ddtrace =.*$|ddtrace = { file = "${{ steps.find-ddtrace-wheel.outputs.wheel_path }}" }|' pyproject.toml
+          sed -i 's|^ddtrace =.*$|ddtrace = { file = "${{ steps.find-ddtrace-wheel.outputs.wheel_path }}" }|' pyproject.toml
 
       - name: Build layer for Python ${{ matrix.python_version }} on ${{ matrix.arch }}
         run: |
diff --git a/pyproject.toml b/pyproject.toml
index f5a49ead..d8aa4201 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,8 +3,12 @@ name = "datadog_lambda"
 version = "8.123.0.dev0"
 description = "The Datadog AWS Lambda Library"
 authors = ["Datadog, Inc. <dev@datadoghq.com>"]
+
+[project]
+name = "datadog_lambda"
 license = "Apache-2.0"
 readme = "README.md"
+requires-python = ">=3.8.0,<4"
 repository = "https://github.com/DataDog/datadog-lambda-python"
 keywords = [
     "datadog",
@@ -12,10 +16,18 @@ keywords = [
     "lambda",
     "layer",
 ]
+dependencies = [
+    "datadog>=0.51.0,<1.0.0",
+    "wrapt>=1.11.2,<2",
+    "ddtrace>=3.19.1,<4; python_version>='3.9.0' and python_version < '3.10'",
+    "ddtrace>=4.1.1,<5; python_version>='3.10.0'",
+    "ujson>=5.9.0",
+]
 packages = [
     { include = "datadog_lambda" }
 ]
 classifiers = [
+    "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
@@ -25,14 +37,13 @@ classifiers = [
     "Programming Language :: Python :: 3.14",
 ]
 
+# can remove tool.poetry.depencies and tool.poetry.extras
+# after deprecation of Python 3.8
 [tool.poetry.dependencies]
 python = ">=3.8.0,<4"
 datadog = ">=0.51.0,<1.0.0"
 wrapt = "^1.11.2"
-ddtrace = [
-    {version = ">=3.19.1,<4", python = ">=3.8,<3.10"},
-    {version = ">=4.1.1,<5", python = ">=3.10"}
-]
+ddtrace = ">=3.19.1,<4"
 ujson = ">=5.9.0"
 botocore = { version = "^1.34.0", optional = true }
 requests = { version ="^2.22.0", optional = true }
@@ -49,9 +60,18 @@ dev = [
     "requests",
 ]
 
+[project.optional-dependencies]
+dev = [
+    "botocore>=1.34.0,<2",
+    "requests>=2.22.0,<3",
+    "pytest>=8.0.0,<9",
+    "pytest-benchmark>=4.0,<5",
+    "flake8>=5.0.4,<6",
+]
+
 [build-system]
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.pytest.ini_options]
-addopts = "--benchmark-disable --benchmark-autosave"
\ No newline at end of file
+addopts = "--benchmark-disable --benchmark-autosave"