diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 32e4308..c8d3c3c 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         runs-on: [ ubuntu-latest, windows-latest, macos-latest ]
-        python-version: [ '3.7', '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.9', '3.10', '3.11', '3.12', '3.13' ]
     runs-on: ${{ matrix.runs-on }}
     steps:
     - uses: actions/checkout@v3
@@ -44,7 +44,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-python@v4
       with:
-        python-version: '3.11'
+        python-version: '3.13'
     - uses: dtolnay/rust-toolchain@stable
     - name: Build package
       uses: PyO3/maturin-action@v1
@@ -62,7 +62,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.7', '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.9', '3.10', '3.11', '3.12', '3.13' ]
         target: [ x86_64, i686 ]
     steps:
     - uses: actions/checkout@v3
@@ -88,7 +88,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: [ '3.7', '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.9', '3.10', '3.11', '3.12', '3.13' ]
         target: [ x64, x86 ]
     steps:
     - uses: actions/checkout@v3
@@ -115,7 +115,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        python-version: [ '3.7', '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.9', '3.10', '3.11', '3.12', '3.13' ]
     steps:
     - uses: actions/checkout@v3
     - uses: actions/setup-python@v4
diff --git a/Cargo.toml b/Cargo.toml
index 39062f9..e585ea7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "python-daachorse"
-version = "0.1.7"
+version = "0.1.8"
 edition = "2021"
 authors = [
     "Koichi Akabe <vbkaisetsu@gmail.com>",
@@ -17,7 +17,7 @@ crate-type = ["cdylib"]
 
 [dependencies]
 daachorse = "1.0.0" # MIT or Apache-2.0
-pyo3 = { version = "0.18.0", features = ["extension-module"] } # Apache-2.0
+pyo3 = { version = "0.24.0", features = ["extension-module"] } # Apache-2.0
 
 [profile.release]
 lto = true
diff --git a/pyproject.toml b/pyproject.toml
index 6492ec4..bc5490c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["maturin>=0.14,<0.15"]
+requires = ["maturin>=1.0,<2.0"]
 build-backend = "maturin"
 
 [project]
diff --git a/src/lib.rs b/src/lib.rs
index 01404dc..ea0806d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-use pyo3::{exceptions::PyValueError, prelude::*, types::PyUnicode};
+use pyo3::{exceptions::PyValueError, prelude::*, types::PyString};
 
 use ::daachorse::{
     CharwiseDoubleArrayAhoCorasick, CharwiseDoubleArrayAhoCorasickBuilder, MatchKind,
@@ -19,22 +19,19 @@ use ::daachorse::{
 /// :type match_kind: int
 /// :rtype: daachorse.Automaton
 #[pyclass]
-#[pyo3(text_signature = "(patterns, /, match_kind = daachorse.MATCH_KIND_STANDARD)")]
 struct Automaton {
     pma: CharwiseDoubleArrayAhoCorasick<usize>,
     match_kind: MatchKind,
-    patterns: Vec<Py<PyUnicode>>,
+    patterns: Vec<Py<PyString>>,
 }
 
 #[pymethods]
 impl Automaton {
     #[new]
-    #[args(match_kind = "0")]
-    fn new(py: Python, patterns: Vec<Py<PyUnicode>>, match_kind: u8) -> PyResult<Self> {
-        let raw_patterns: PyResult<Vec<String>> = patterns
-            .iter()
-            .map(|pat| pat.as_ref(py).extract())
-            .collect();
+    #[pyo3(signature = (patterns, /, match_kind = 0))]
+    fn new(py: Python, patterns: Vec<Py<PyString>>, match_kind: u8) -> PyResult<Self> {
+        let raw_patterns: PyResult<Vec<String>> =
+            patterns.iter().map(|pat| pat.extract(py)).collect();
         let raw_patterns = raw_patterns?;
         let match_kind = MatchKind::from(match_kind);
         Ok(Self {
@@ -142,7 +139,7 @@ impl Automaton {
     /// :type haystack: str
     /// :rtype: list[str]
     #[pyo3(text_signature = "($self, haystack, /)")]
-    fn find_as_strings(self_: PyRef<Self>, haystack: &str) -> PyResult<Vec<Py<PyUnicode>>> {
+    fn find_as_strings(self_: PyRef<Self>, haystack: &str) -> PyResult<Vec<Py<PyString>>> {
         let match_kind = self_.match_kind;
         let py = self_.py();
         let pma = &self_.pma;
@@ -222,7 +219,7 @@ impl Automaton {
     fn find_overlapping_as_strings(
         self_: PyRef<Self>,
         haystack: &str,
-    ) -> PyResult<Vec<Py<PyUnicode>>> {
+    ) -> PyResult<Vec<Py<PyString>>> {
         if self_.match_kind != MatchKind::Standard {
             return Err(PyValueError::new_err("match_kind must be STANDARD"));
         }
@@ -314,7 +311,7 @@ impl Automaton {
     fn find_overlapping_no_suffix_as_strings(
         self_: PyRef<Self>,
         haystack: &str,
-    ) -> PyResult<Vec<Py<PyUnicode>>> {
+    ) -> PyResult<Vec<Py<PyString>>> {
         if self_.match_kind != MatchKind::Standard {
             return Err(PyValueError::new_err("match_kind must be STANDARD"));
         }
@@ -333,7 +330,7 @@ impl Automaton {
 }
 
 #[pymodule]
-fn daachorse(_py: Python, m: &PyModule) -> PyResult<()> {
+fn daachorse(_py: Python, m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_class::<Automaton>()?;
     m.add("MATCH_KIND_STANDARD", MatchKind::Standard as u8)?;
     m.add(