diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3907b98..f87bbeb 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         include:
           - os: macos-latest
             python-version: "3.12"
diff --git a/pyproject.toml b/pyproject.toml
index 4a84442..58b5639 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,6 @@ classifiers = [
   "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
   "Natural Language :: English",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12"
diff --git a/tox.ini b/tox.ini
index fca23f2..37f0c7c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,14 +1,12 @@
 [tox]
 # add py313 when https://github.com/microsoft/LightGBM/pull/6668 is merged
-env_list = py38, py39, py310, py311, py312, lint
+env_list = py310, py311, py312, lint
 
 [gh]
 python =
     3.12 = 3.12, lint
     3.11 = 3.11
     3.10 = 3.10
-    3.9 = 3.9
-    3.8 = 3.8
 
 [testenv:lint]
 conda_deps=