diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2014ed1..5f39f30 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13.0-beta.1"]
     steps:
       - uses: actions/checkout@v3
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d76b62..9117989 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,9 @@
 # Release Notes
 
-## 0.4.1 ~ 0.4.2
+## 0.4.1 ~ 0.4.3
 
 - Bump dependencies
-- Support Python 3.12
+- Support Python 3.12, 3.13
 
 ## 0.4.0
 
diff --git a/README.md b/README.md
index 746a904..305aa26 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ Other language versions:
 - [Golang](https://github.com/ecies/go)
 - [WASM](https://github.com/ecies/rs-wasm)
 
-You can also check a FastAPI web backend demo [here](https://github.com/kigawas/eciespy-demo).
+You can also check a FastAPI web backend demo [here](https://github.com/ecies/py-demo).
 
 ## Install
 
diff --git a/poetry.lock b/poetry.lock
index b2f6046..afc3cf9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -31,124 +31,88 @@ test = ["astroid (>=1,<2)", "astroid (>=2,<4)", "pytest"]
 
 [[package]]
 name = "cffi"
-version = "1.16.0"
+version = "1.17.0.dev0"
 description = "Foreign Function Interface for Python calling C code."
 optional = false
 python-versions = ">=3.8"
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+files = []
+develop = false
 
 [package.dependencies]
 pycparser = "*"
 
+[package.source]
+type = "git"
+url = "https://github.com/python-cffi/cffi.git"
+reference = "HEAD"
+resolved_reference = "772528e1b77da61c0664e7495e67141f3c4714f0"
+
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 optional = false
 python-versions = ">=3.8"
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 [package.dependencies]
 asn1crypto = "*"
 cffi = ">=1.3.0"
 
+[package.extras]
+dev = ["coverage", "pytest", "pytest-benchmark"]
+
 [[package]]
 name = "colorama"
 version = "0.4.6"
@@ -807,28 +771,28 @@ testing = ["fields", "hunter", "process-tests", "pytest-xdist", "virtualenv"]
 
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 name = "ruff"
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+version = "0.4.9"
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+    {file = "ruff-0.4.9-py3-none-musllinux_1_2_armv7l.whl", hash = "sha256:8c1aff58c31948cc66d0b22951aa19edb5af0a3af40c936340cd32a8b1ab7438"},
+    {file = "ruff-0.4.9-py3-none-musllinux_1_2_i686.whl", hash = "sha256:784d3ec9bd6493c3b720a0b76f741e6c2d7d44f6b2be87f5eef1ae8cc1d54c84"},
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+    {file = "ruff-0.4.9-py3-none-win32.whl", hash = "sha256:8064590fd1a50dcf4909c268b0e7c2498253273309ad3d97e4a752bb9df4f521"},
+    {file = "ruff-0.4.9-py3-none-win_amd64.whl", hash = "sha256:e0a22c4157e53d006530c902107c7f550b9233e9706313ab57b892d7197d8e52"},
+    {file = "ruff-0.4.9-py3-none-win_arm64.whl", hash = "sha256:5d5460f789ccf4efd43f265a58538a2c24dbce15dbf560676e430375f20a8198"},
+    {file = "ruff-0.4.9.tar.gz", hash = "sha256:f1cb0828ac9533ba0135d148d214e284711ede33640465e706772645483427e3"},
 ]
 
 [[package]]
@@ -923,4 +887,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "70aa2ec7801797662825d6c0c758f9b4c88e647922b21a096045e46f8b4f5feb"
+content-hash = "f03cb24a7e3003dfa4ec3dd54fa9cf94cc4766c99c6c01bdb238e1fa1e630e2e"
diff --git a/pyproject.toml b/pyproject.toml
index 8607999..c1a24f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "eciespy"
 packages = [
   {include = "ecies"},
 ]
-version = "0.4.2"
+version = "0.4.3"
 # docs
 authors = ["Weiliang Li <to.be.impressive@gmail.com>"]
 description = "Elliptic Curve Integrated Encryption Scheme for secp256k1 in Python"
@@ -36,7 +36,8 @@ include = ["ecies/py.typed"]
 python = "^3.8"
 
 # 3rd party
-coincurve = ">=13,<20"
+cffi = {git = "https://github.com/python-cffi/cffi.git", python = ">3.12"}# REMOVE ME later
+coincurve = ">=13,<21"
 eth-keys = ">=0.4,<0.6"
 pycryptodome = "^3.19.1"
 
@@ -56,9 +57,5 @@ eciespy = "ecies.__main__:main"
 build-backend = "poetry.core.masonry.api"
 requires = ["poetry-core>=1.0.0"]
 
-[tool.isort]
-multi_line_output = 3
-profile = "black"
-
 [tool.pytest.ini_options]
 addopts = "--doctest-modules"