diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..eda677d
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,39 @@
+# Include CMake files
+include CMakeLists.txt
+include Utils.cmake
+recursive-include cmake *
+
+# Include C++ source files
+recursive-include src *.cpp *.h *.hpp
+recursive-include include *.h *.hpp
+
+# Include third-party dependencies
+recursive-include third-party *
+
+# Include test files
+recursive-include test *.py *.cpp *.h
+
+# Include examples
+recursive-include examples *
+
+# Include documentation
+include README.md
+include LICENSE
+include CONTRIBUTING.md
+include CODE_OF_CONDUCT
+
+# Include other necessary files
+include pyproject.toml
+include pytest.ini
+include TARGETS
+include targets.bzl
+
+# Exclude build artifacts and unnecessary files
+global-exclude *.pyc
+global-exclude *.pyo
+global-exclude __pycache__
+global-exclude .git*
+global-exclude .DS_Store
+prune build
+prune dist
+prune *.egg-info
diff --git a/setup.py b/setup.py
index 63ced6c..6b7f4fc 100644
--- a/setup.py
+++ b/setup.py
@@ -10,10 +10,12 @@
 import re
 import subprocess
 import sys
+import shutil
 from pathlib import Path
 
 from setuptools import Extension, find_packages, setup
 from setuptools.command.build_ext import build_ext
+from setuptools.command.build_py import build_py as build_py_orig
 
 # Read the README file
 with open("README.md", "r") as f:
@@ -126,19 +128,52 @@ def build_extension(self, ext):  # noqa C901
         )
 
 
+class BuildPy(build_py_orig):
+    """Ensure header files are copied into the package during build."""
+
+    def run(self):
+        super().run()
+        headers_src = Path("include")
+        if not headers_src.exists():
+            return
+
+        headers_dst = Path(self.build_lib) / "pytorch_tokenizers" / "include"
+        for file_path in headers_src.rglob("*"):
+            if file_path.is_file():
+                destination = headers_dst / file_path.relative_to(headers_src)
+                destination.parent.mkdir(parents=True, exist_ok=True)
+                shutil.copy2(file_path, destination)
+
+
 setup(
     name="pytorch-tokenizers",
-    version="0.1.0",
+    version="1.0.1",
     long_description=long_description,
     long_description_content_type="text/markdown",
     url="https://github.com/meta-pytorch/tokenizers",
     packages=find_packages(),
+    include_package_data=True,
+    package_data={
+        "pytorch_tokenizers": [
+            "include/*.h",
+            "include/**/*.h",
+            "include/*.hpp",
+            "include/**/*.hpp",
+        ]
+    },
     ext_modules=[CMakeExtension("pytorch_tokenizers.pytorch_tokenizers_cpp")],
-    cmdclass={"build_ext": CMakeBuild},
+    cmdclass={
+        "build_ext": CMakeBuild,
+        "build_py": BuildPy,
+    },
     zip_safe=False,
     python_requires=">=3.10",
     install_requires=[
         "pybind11>=2.6.0",
+        "sentencepiece",
+        "mistral-common",
+        "tokenizers",
+        "tiktoken",
     ],
     setup_requires=[
         "pybind11>=2.6.0",
@@ -150,8 +185,6 @@ def build_extension(self, ext):  # noqa C901
         "License :: OSI Approved :: BSD License",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
diff --git a/src/re2_regex.cpp b/src/re2_regex.cpp
index c62c5f7..c1269c5 100644
--- a/src/re2_regex.cpp
+++ b/src/re2_regex.cpp
@@ -19,9 +19,10 @@ Error Re2Regex::compile(const std::string& pattern) {
   if (regex_->ok()) {
     return Error::Ok;
   } else {
+    // It should log using Error level but it's too confusing.
     TK_LOG(
-        Error,
-        "Failed to compile regex: %s, error: %s",
+        Info,
+        "Re2 failed to compile regex: %s, error: %s\nThis may be ok if a fallback regex is used.",
         pattern.c_str(),
         regex_->error().c_str());
     return Error::RegexFailure;