diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..897d099
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,15 @@
+[build-system]
+requires = ["setuptools>=68.0"]
+build-backend = "setuptools.backends._legacy:_Backend"
+
+[project]
+name = "deltatrace"
+version = "0.1.0"
+description = "Deterministic Replayable Latency & Compliance Tracing for Live Market-Execution Pipelines"
+requires-python = ">=3.10"
+dependencies = [
+    "cryptography>=41.0.0",
+]
+
+[project.optional-dependencies]
+test = ["pytest>=7.0"]