diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 3ef6605..297c621 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13]
+        python-version: [3.8, 3.9, 3.10, 3.11, 3.12, 3.13]
 
     steps:
       - uses: actions/checkout@v4
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bfce7e2..e983ac9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,7 +21,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
     - imageio>=2.37.0
     - PyQt5>=5.15.11
     - XlsxWriter>=3.2.2
-- tests for python: 3.10, 3.11, 3.12, 3.13
+- tests for python
+  - added: 3.10, 3.11, 3.12, 3.13
+  - removed: 3.6, 3.7
 
 ## [0.3.0] - 2021-08-30
 
diff --git a/setup.py b/setup.py
index df10319..0d072ce 100644
--- a/setup.py
+++ b/setup.py
@@ -30,8 +30,6 @@
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.6",
         "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
         "Operating System :: OS Independent",
         "Development Status :: 4 - Beta",