diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bd84fec3..1c361d73 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,7 +23,7 @@ jobs:
       # You can use PyPy versions in python-version.
       # For example, pypy2 and pypy3
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
diff --git a/m3u8/model.py b/m3u8/model.py
index 9bc16071..1dc7a5e4 100644
--- a/m3u8/model.py
+++ b/m3u8/model.py
@@ -657,9 +657,9 @@ def dumps(self, last_segment, timespec="milliseconds", infspec="auto"):
         if self.uri:
             if self.duration is not None:
                 if infspec == "milliseconds":
-                    duration = "{:.3f}".format(self.duration)
+                    duration = f"{self.duration:.3f}"
                 elif infspec == "microseconds":
-                    duration = "{:.6f}".format(self.duration)
+                    duration = f"{self.duration:.6f}"
                 else:
                     duration = number_to_string(self.duration)
                 output.append("#EXTINF:%s," % duration)
diff --git a/m3u8/version_matching.py b/m3u8/version_matching.py
index 3d0a712f..b9e653e9 100644
--- a/m3u8/version_matching.py
+++ b/m3u8/version_matching.py
@@ -1,10 +1,8 @@
-from typing import List
-
 from m3u8 import protocol
 from m3u8.version_matching_rules import VersionMatchingError, available_rules
 
 
-def get_version(file_lines: List[str]):
+def get_version(file_lines: list[str]):
     for line in file_lines:
         if line.startswith(protocol.ext_x_version):
             version = line.split(":")[1]
@@ -15,7 +13,7 @@ def get_version(file_lines: List[str]):
 
 def valid_in_all_rules(
     line_number: int, line: str, version: float
-) -> List[VersionMatchingError]:
+) -> list[VersionMatchingError]:
     errors = []
     for rule in available_rules:
         validator = rule(version, line_number, line)
@@ -26,7 +24,7 @@ def valid_in_all_rules(
     return errors
 
 
-def validate(file_lines: List[str]) -> List[VersionMatchingError]:
+def validate(file_lines: list[str]) -> list[VersionMatchingError]:
     found_version = get_version(file_lines)
     if found_version is None:
         return []
diff --git a/m3u8/version_matching_rules.py b/m3u8/version_matching_rules.py
index 55be5db2..fae77dd0 100644
--- a/m3u8/version_matching_rules.py
+++ b/m3u8/version_matching_rules.py
@@ -1,5 +1,4 @@
 from dataclasses import dataclass
-from typing import List, Type
 
 from m3u8 import protocol
 
@@ -102,7 +101,7 @@ def validate(self):
         return self.version >= 4
 
 
-available_rules: List[Type[VersionMatchRuleBase]] = [
+available_rules: list[type[VersionMatchRuleBase]] = [
     ValidIVInEXTXKEY,
     ValidFloatingPointEXTINF,
     ValidEXTXBYTERANGEOrEXTXIFRAMESONLY,
diff --git a/setup.py b/setup.py
index 237d7aeb..8ec1ff96 100644
--- a/setup.py
+++ b/setup.py
@@ -24,5 +24,5 @@
     description="Python m3u8 parser",
     long_description=long_description,
     long_description_content_type="text/markdown",
-    python_requires=">=3.7",
+    python_requires=">=3.9",
 )
diff --git a/tests/test_model.py b/tests/test_model.py
index 8185fe38..da47a483 100755
--- a/tests/test_model.py
+++ b/tests/test_model.py
@@ -764,7 +764,7 @@ def test_create_sub_directories_with_relative_path(tmpdir, monkeypatch):
     expected_file_path = os.path.join(tmpdir, relative_path)
     assert os.path.exists(expected_file_path)
 
-    with open(expected_file_path, "r") as file:
+    with open(expected_file_path) as file:
         assert file.read().strip() == playlists.SIMPLE_PLAYLIST.strip()