diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index f5635847..36ef5610 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -18,9 +18,7 @@ jobs:
       max-parallel: 1  # Hinet doesn't allow parallel data request
       fail-fast: false
       matrix:
-        #python-version: [3.5, 3.6, 3.7, 3.8]
-        #os: [ubuntu-latest, macos-latest]
-        python-version: ["3.6", "3.10"]
+        python-version: ["3.7", "3.10"]
         os: [macos-latest, ubuntu-latest]
 
     steps:
diff --git a/docs/installation.rst b/docs/installation.rst
index 3b03895e..04a87f8a 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -6,7 +6,7 @@ Prerequisites
 
 To use HinetPy, you need:
 
-- Python >= 3.6
+- Python >= 3.7
 - win32tools provided by NIED Hi-net (see below for install instructions)
 - a Hi-net account (register on Hi-net website to get your user name and password)
 
diff --git a/docs/locale/zh_CN/LC_MESSAGES/installation.po b/docs/locale/zh_CN/LC_MESSAGES/installation.po
index cf2a8a77..8fe2af57 100644
--- a/docs/locale/zh_CN/LC_MESSAGES/installation.po
+++ b/docs/locale/zh_CN/LC_MESSAGES/installation.po
@@ -29,7 +29,7 @@ msgid "To use HinetPy, you need:"
 msgstr "为了使用 HinetPy，你需要:"
 
 #: ../../installation.rst:9
-msgid "Python >= 3.6"
+msgid "Python >= 3.7"
 msgstr ""
 
 #: ../../installation.rst:10
diff --git a/setup.py b/setup.py
index d569d5e6..57b5ab07 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,6 @@
     f"License :: OSI Approved :: {LICENSE}",
     "Operating System :: POSIX :: Linux",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",