diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d667741..a1e5255 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,16 +2,15 @@ name: base62
 
 on: [push]
 
+permissions:
+  contents: read
+
 jobs:
   build:
-    runs-on: ${{ matrix.runs-on }}
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        runs-on: [ubuntu-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
-        include:
-          - runs-on: ubuntu-20.04
-            python-version: "3.6"
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/.gitignore b/.gitignore
index 6ee4a15..efca24c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@
 build
 dist
 
+.coverage
+.pytest_cache
diff --git a/setup.py b/setup.py
index d4c8ce6..99118d4 100644
--- a/setup.py
+++ b/setup.py
@@ -23,11 +23,10 @@ def readme():
     url="http://github.com/suminb/base62",
     packages=[],
     classifiers=[
-        "Programming Language :: Python :: 3.6",
-        "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 :: 3.14",
     ],
 )
diff --git a/tests/test_basic.py b/tests/test_basic.py
index bade00f..6ad9cc8 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -2,7 +2,6 @@
 
 import base62
 
-
 bytes_int_pairs = [
     (b"\x01", 1),
     (b"\x01\x01", 0x0101),