diff --git a/build.py b/builder.py
similarity index 100%
rename from build.py
rename to builder.py
diff --git a/pyproject.toml b/pyproject.toml
index 1b9fa681..6e88e3c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools >= 61.0.0"]
+requires = ["setuptools >= 75.3.1"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -9,13 +9,12 @@ authors = [
     {name = "Andrew Senetar", email = "arsenetar@voltaicideas.net"}
 ]
 readme = "README.md"
-requires-python = ">=3.7, <3.13"
+license = "GPL-3.0-or-later"
+license-files = ["LICENSE"]
 keywords = ["deduplication"]
-license = {text = "GPLv3"}
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: End Users/Desktop",
-    "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
     "Operating System :: MacOS :: MacOS X",
     "Operating System :: Microsoft :: Windows",
     "Operating System :: POSIX",
@@ -28,6 +27,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Topic :: Desktop Environment :: File Managers",
 ]
+requires-python = ">=3.7, <3.13"
 
 dynamic = ["version"]
 
@@ -38,7 +38,7 @@ dependencies = [
     "PyQt5 >=5.15.0,<6.0; sys_platform != 'linux'",
     "pywin32>=304; sys_platform == 'win32'",
     "semantic-version>=2.0.0,<3.0.0",
-    "Send2Trash>=1.8.2,<2.0.0",
+    "Send2Trash>=1.8.2",
     "xxhash>=3.0.0,<4.0.0",
 ]
 
@@ -57,7 +57,7 @@ build = [
 [project.urls]
 Homepage = "https://dupeguru.voltaicideas.net/"
 Documentation = "https://dupeguru.voltaicideas.net/help/en/"
-Repository = "https://github.com/arsenetar/dupeguru/"
+Repository = "https://github.com/arsenetar/dupeguru.git"
 Issues = "https://github.com/arsenetar/dupeguru/issues"
 Releases = "https://github.com/arsenetar/dupeguru/releases"
 
@@ -77,3 +77,10 @@ include = ["core", "hscommon", "qt"]
 
 [tool.setuptools.dynamic]
 version = {attr = "core.__version__"}
+
+[tool.setuptools]
+ext-modules = [
+    {name = "core.pe._block", sources = ["core/pe/modules/block.c", "core/pe/modules/common.c"], include-dirs = ["core/pe/modules"]},
+    {name = "core.pe._cache", sources = ["core/pe/modules/cache.c", "core/pe/modules/common.c"], include-dirs = ["core/pe/modules"]},
+    {name = "qt.pe._block_qt", sources = ["qt/pe/modules/block.c"]},
+]
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 97cb61e3..00000000
--- a/setup.py
+++ /dev/null
@@ -1,26 +0,0 @@
-from setuptools import setup, Extension
-from pathlib import Path
-
-exts = [
-    Extension(
-        "core.pe._block",
-        [
-            str(Path("core", "pe", "modules", "block.c")),
-            str(Path("core", "pe", "modules", "common.c")),
-        ],
-        include_dirs=[str(Path("core", "pe", "modules"))],
-    ),
-    Extension(
-        "core.pe._cache",
-        [
-            str(Path("core", "pe", "modules", "cache.c")),
-            str(Path("core", "pe", "modules", "common.c")),
-        ],
-        include_dirs=[str(Path("core", "pe", "modules"))],
-    ),
-    Extension("qt.pe._block_qt", [str(Path("qt", "pe", "modules", "block.c"))]),
-]
-
-headers = [str(Path("core", "pe", "modules", "common.h"))]
-
-setup(ext_modules=exts, headers=headers)