diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 9ec0c69..7ea7e09 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -26,7 +26,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.x"
+          python-version: "3.13"
           cache: "pip"
 
       - name: Install dependencies
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 11b26bd..e0f8893 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        py: ["3.13-dev", "3.12", "3.11", "3.10", "3.9"]
+        py: ["3.13", "3.12", "3.11", "3.10", "3.9"]
 
     runs-on: ${{ matrix.os }}
     name: Run test with Python ${{ matrix.py }} on ${{ matrix.os }}
diff --git a/pyproject.toml b/pyproject.toml
index adbd622..1065982 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,6 +17,7 @@ classifiers = [
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',
     'Programming Language :: Python :: 3.12',
+    'Programming Language :: Python :: 3.13',
 ]
 requires-python = ">= 3.9"
 dynamic = ["version"]
@@ -33,17 +34,17 @@ version = { attr = "cchardet.__version__" }
 
 [tool.rye]
 dev-dependencies = [
-    "chardet>=5.2.0",
-    "cython>=3.0.10",
-    "setuptools>=70.0.0",
-    "pytest>=8.2.1",
-    "ruff>=0.4.6",
+    "chardet==5.2.0",
+    "cython==3.1.1",
+    "setuptools==80.8.0",
+    "pytest==8.3.5",
+    "ruff==0.11.10",
 ]
 
 [tool.ruff]
 exclude = ["src/ext"]
 line-length = 100
-target-version = "py39"
+target-version = "py313"
 lint.select = ["E", "F", "I", "N"]
 format.quote-style = "double"
 format.indent-style = "space"
@@ -52,7 +53,7 @@ format.indent-style = "space"
 skip = "pp* cp36-* cp37-* cp38-*"
 archs = "auto"
 before-build = [
-    "pip install cython==3.0.10",
+    "pip install cython==3.1.1",
     "cython {project}/src/cchardet/_cchardet.pyx",
 ]
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 896c27f..a5f4430 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 chardet==5.2.0
-cython==3.0.10
-pytest==8.2.1
-ruff==0.4.6
-setuptools==70.0.0
+cython==3.1.1
+pytest==8.3.5
+ruff==0.11.10
+setuptools==80.8.0