diff --git a/pyproject.toml b/pyproject.toml
index 6e85877..5516889 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,20 @@
 [build-system]
-requires = ["poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["setuptools>=42"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "friendly-captcha-client"
+version = "0.1.0"
+description = "A client for Friendly Captcha."
+readme = "README.md"
+requires-python = ">=3.6"
+dependencies = [
+    "requests",
+    "pydantic",
+]
+
+[tool.setuptools.packages.find]
+exclude = ["tests*"]
 
 [tool.poetry]
 name = "friendly-captcha-client"
@@ -17,8 +31,8 @@ keywords = ["Friendly Captcha Client", "Captcha"]
 
 [tool.poetry.dependencies]
 python = "^3.6"
-requests = "2.31.0"
-pydantic = "2.1.1"
+requests = ">=2.31.0"
+pydantic = ">=2.1.1"
 
 [tool.poetry.dev-dependencies]
 pytest = "7.4.0"
diff --git a/requirements.txt b/requirements.txt
index 19a5900..84604d1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-requests==2.31.0
-pydantic==2.1.1
\ No newline at end of file
+requests>=2.31.0
+pydantic>=2.1.1
\ No newline at end of file
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..a4f49f9
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,2 @@
+import setuptools
+setuptools.setup()