diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
index 073eccb..144510f 100644
--- a/.github/workflows/cibuildwheel.yml
+++ b/.github/workflows/cibuildwheel.yml
@@ -9,7 +9,7 @@ env:
     # cp37-win32 cp38-win32 cp39-win32
     # TODO: manylinux aarch64
     # TODO: macos arm64
-    CIBW_SKIP: cp2* pp* cp35* cp36* cp37* *-win32 *-musllinux* *-macosx_*_universal2* *win_arm64* *-manylinux_arm64 *-manylinux_i686 *-manylinux_ppc64le *-manylinux_s390x *-manylinux_aarch64
+    CIBW_SKIP: cp2* pp* cp35* cp36* cp37* cp38* cp39* *-win32 *-musllinux* *-macosx_*_universal2* *win_arm64* *-manylinux_arm64 *-manylinux_i686 *-manylinux_ppc64le *-manylinux_s390x *-manylinux_aarch64
     CIBW_BEFORE_BUILD: python -m pip install -r requirements.txt --upgrade
     CIBW_TEST_SKIP: "*-macosx_arm64"
     #CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
diff --git a/requirements.txt b/requirements.txt
index 0f56742..781bf2f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 numpy
 scipy
-cython
+Cython
 matplotlib
 scikit-learn
diff --git a/setup.py b/setup.py
index ecca74b..04c8ff2 100644
--- a/setup.py
+++ b/setup.py
@@ -177,11 +177,13 @@ def build_extensions(self):
     classifiers=[
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
+        #"Programming Language :: Python :: 3.7",
+        #"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",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: 3 :: Only",
         "Operating System :: Microsoft :: Windows",
         "Operating System :: POSIX",