diff --git a/Readme.md b/Readme.md
index fb9b0c4..7491cfa 100644
--- a/Readme.md
+++ b/Readme.md
@@ -89,6 +89,8 @@ Mirrors the standard `hashlib` interface for data streams.
 ```python
 from keyedstablehash import siphash24
 
+secret_key = b"\x01" * 16
+
 s = siphash24(key=secret_key)
 s.update(b"chunk_one")
 s.update(b"chunk_two")
@@ -107,15 +109,19 @@ import pandas as pd
 import pyarrow as pa
 from keyedstablehash import hash_pandas_series, hash_arrow_array
 
+secret_key = b"\x01" * 16
+
 # --- Pandas ---
 df = pd.DataFrame({"user_id": ["u1", "u2", "u1"]})
 df["hash"] = hash_pandas_series(df["user_id"], key=secret_key)
 # Result: A Series of uint64 hashes
+print(df["hash"])
 
 # --- PyArrow ---
 arr = pa.array(["alpha", "beta", "gamma"])
 hashes = hash_arrow_array(arr, key=secret_key)
 # Result: A pyarrow.Array(uint64)
+print(hashes)
 
 ```
 
diff --git a/pyproject.toml b/pyproject.toml
deleted file mode 100644
index 370a559..0000000
--- a/pyproject.toml
+++ /dev/null
@@ -1,37 +0,0 @@
-[build-system]
-requires = ["setuptools>=68", "wheel"]
-build-backend = "setuptools.build_meta"
-
-[project]
-name = "keyedstablehash"
-version = "0.0.1"
-description = "Stable, keyed hashing for Python objects and columnar data (SipHash-like PRF semantics)."
-readme = "Readme.md"
-requires-python = ">=3.9"
-authors = [{ name = "Your Name", email = "you@example.com" }]
-classifiers = [
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3 :: Only",
-    "License :: OSI Approved :: MIT License",
-    "Operating System :: OS Independent",
-]
-dependencies = []
-
-[project.optional-dependencies]
-dataframes = ["pandas>=1.5"]
-arrow = ["pyarrow>=12.0.0"]
-polars = ["polars>=0.20.0"]
-dev = ["pytest>=7.0", "pytest-cov"]
-
-[project.urls]
-Homepage = "https://example.com/keyedstablehash"
-Repository = "https://example.com/keyedstablehash"
-
-[tool.setuptools.package-dir]
-"" = "src"
-
-[tool.setuptools.packages.find]
-where = ["src"]
-
-[tool.setuptools.package-data]
-"keyedstablehash" = ["py.typed"]
diff --git a/setup.py b/setup.py
index bf68485..5a3cf2f 100644
--- a/setup.py
+++ b/setup.py
@@ -2,13 +2,18 @@
 
 setup(
     name="keyedstablehash",
-    version="0.0.1",
+    version="0.0.4",
     description="Stable, keyed hashing for Python objects and columnar data. Think `stablehash`, but with SipHash-like keyed PRF semantics so hashes are deterministic for a given key and resistant to adversarial inputs.",
     long_description=open("Readme.md", encoding="utf-8").read(),
     long_description_content_type="text/markdown",
     author="Shlok Tadilkar",
     author_email="shloktadilkar@gmail.com",
     url="https://github.com/shloktech/keyedstablehash",
+    project_urls={
+        "Source": "https://github.com/shloktech/keyedstablehash",
+        "Tracker": "https://github.com/shloktech/keyedstablehash/issues",
+        "Documentation": "https://github.com/shloktech/keyedstablehash#readme",
+    },
     packages=find_packages(where="src"),
     package_dir={"": "src"},
     include_package_data=True,