diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000000000000000000000000000000000000..db4e346bdd75728a22a96d80e9ad44a8d6e95bd1
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+*.gz filter=lfs diff=lfs merge=lfs -text
+*.xz filter=lfs diff=lfs merge=lfs -text
diff --git a/.lfsconfig b/.lfsconfig
new file mode 100644
index 0000000000000000000000000000000000000000..3fa1357bc0e716cc7219a26415f9850711ef2484
--- /dev/null
+++ b/.lfsconfig
@@ -0,0 +1,2 @@
+[lfs]
+	url = https://artlfs.openeuler.openatom.cn/src-openEuler/python-bcrypt
diff --git a/bcrypt-4.2.0.tar.gz b/bcrypt-4.2.0.tar.gz
index 31f6de1424a8317cc1afbd6bf6c878ec4b5574dc..4c7a91e3c8a5733e7d95b692de8ac8d1019dda9e 100644
Binary files a/bcrypt-4.2.0.tar.gz and b/bcrypt-4.2.0.tar.gz differ
diff --git a/python-bcrypt.spec b/python-bcrypt.spec
index ef5010274548684e31e2d9d03f9095b53bafbf06..c7b1b3bebdb05f0e828624527c306eea4e6c17d6 100644
--- a/python-bcrypt.spec
+++ b/python-bcrypt.spec
@@ -1,8 +1,6 @@
-%global debug_package %{nil}
-
 Name:           python-bcrypt
 Version:        4.2.0
-Release:        3
+Release:        4
 Summary:        Modern password hashing for your software and your servers
 License:        Apache-2.0
 URL:            https://github.com/pyca/bcrypt/
@@ -11,60 +9,55 @@ Source1:	vendor.tar.gz
 Source2:	config.toml
 %description
 Good password hashing for your software and your servers.
-This library should be compatible with py-bcrypt and it will run on Python 2.7, 3.4+, and PyPy 2.6+.
+This library should be compatible with py-bcrypt and it will run on Python 3.7+.
 
 %package -n python3-bcrypt
 Summary:        Modern password hashing for your software and your servers
-Provides:       python-bcrypt
-
-BuildRequires:  python3-devel
-BuildRequires:  python3-setuptools-rust
-BuildRequires:  rust cargo
+Provides:       python-bcrypt = %{version}-%{release}
+
+BuildRequires:  python3-devel >= 3.7
+BuildRequires:  python3-setuptools >= 42.0
+BuildRequires:  python3-setuptools-rust >= 1.7.0
+BuildRequires:  rust >= 1.64.0
+BuildRequires:  cargo
+BuildRequires:  rust-packaging
 BuildRequires:  python3-cffi
 BuildRequires:  gcc
-BuildRequires:  python3-pytest
+BuildRequires:  python3-pytest >= 3.2.1
 BuildRequires:	python3-pip
 BuildRequires:	python3-wheel
-%description -n python3-bcrypt
-Good password hashing for your software and your servers.
-This library should be compatible with py-bcrypt and it will run on Python 2.7, 3.4+, and PyPy 2.6+.
+Obsoletes:      %{name}-help < %{version}-%{release}
 
-%package help
-Summary:        Modern password hashing for your software and your servers
-Buildarch:      noarch
-Provides:       python3-bcrypt-doc
-%description help
+%description -n python3-bcrypt
 Good password hashing for your software and your servers.
-This library should be compatible with py-bcrypt and it will run on Python 2.7, 3.4+, and PyPy 2.6+.
+This library should be compatible with py-bcrypt and it will run on Python 3.7+.
 
 %prep
-%autosetup -n bcrypt-%{version} -p1
-tar zxvf %{SOURCE1}
+%autosetup -n bcrypt-%{version} -p1 -a1
 mkdir .cargo
 cp %{SOURCE2} .cargo/
 
-
 %build
+%set_build_flags
 %pyproject_build
 
 %install
+%set_build_flags
 %pyproject_install
-install -d -m755 %{buildroot}/%{_pkgdocdir}
-if [ -d doc ]; then cp -arf doc %{buildroot}/%{_pkgdocdir}; fi
-if [ -d docs ]; then cp -arf docs %{buildroot}/%{_pkgdocdir}; fi
-if [ -d example ]; then cp -arf example %{buildroot}/%{_pkgdocdir}; fi
 
 %check
 export PYTHONPATH=%{buildroot}%{python3_sitearch}
 pytest
 
 %files -n python3-bcrypt
+%doc README.rst
 %{python3_sitearch}/*
 
-%files help
-%{_docdir}/*
-
 %changelog
+* Sat Aug 09 2025 Funda Wang <fundawang@yeah.net> - 4.2.0-4
+- correctly build extension with updated rust flags
+- drop empty help sub package
+
 * Sun Aug 03 2025 Funda Wang <fundawang@yeah.net> - 4.2.0-3
 - drop unused buildrequires
 
diff --git a/vendor.tar.gz b/vendor.tar.gz
index e1742694984bd6bfb2b03e77aca38242d7e91d47..8bc29eb443043dd0a57654af990880d8360b87c4 100644
Binary files a/vendor.tar.gz and b/vendor.tar.gz differ