diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b023fd1e..f7ca9639 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,11 +14,11 @@ jobs:
     strategy:
       max-parallel: 6
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
@@ -40,10 +40,10 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     steps:
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v2
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v4
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Finished
         run: |
           pip3 install coveralls
@@ -54,11 +54,11 @@ jobs:
   docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v4
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install dependencies
         run: pip install tox
       - name: Check docs
@@ -67,11 +67,11 @@ jobs:
   formatting:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v4
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install dependencies
         run: pip install tox
       - name: Check formatting
@@ -80,12 +80,12 @@ jobs:
   setuppy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v4
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install dependencies
         run: pip install tox
       - name: Check docs
-        run: tox -e setuppy
\ No newline at end of file
+        run: tox -e setuppy
diff --git a/HISTORY.rst b/HISTORY.rst
index a85a8ce0..418f95c8 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,6 +3,11 @@
 History
 -------
 
+Next release
+++++++++++++++++++
+
+- Dropped support for Python 3.6, add support for Python 3.10 and 3.11.
+
 1.1.0 (2021-04-09)
 ++++++++++++++++++
 
diff --git a/README.rst b/README.rst
index 176e961b..35b69669 100644
--- a/README.rst
+++ b/README.rst
@@ -17,7 +17,7 @@ Python job scheduling for humans. Run Python functions (or any other callable) p
 - In-process scheduler for periodic jobs. No extra processes needed!
 - Very lightweight and no external dependencies.
 - Excellent test coverage.
-- Tested on Python and 3.6, 3.7, 3.8, 3.9
+- Tested on Python and 3.7, 3.8, 3.9, 3.10, 3.11
 
 Usage
 -----
@@ -33,7 +33,7 @@ Usage
 
     def job():
         print("I'm working...")
-    
+
     schedule.every(10).seconds.do(job)
     schedule.every(10).minutes.do(job)
     schedule.every().hour.do(job)
@@ -46,9 +46,9 @@ Usage
 
     def job_with_argument(name):
         print(f"I am {name}")
-        
+
     schedule.every(10).seconds.do(job_with_argument, name="Peter")
-        
+
     while True:
         schedule.run_pending()
         time.sleep(1)
diff --git a/docs/index.rst b/docs/index.rst
index 7e983d38..e051a2ee 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -17,7 +17,7 @@ Python job scheduling for humans. Run Python functions (or any other callable) p
 - In-process scheduler for periodic jobs. No extra processes needed!
 - Very lightweight and no external dependencies.
 - Excellent test coverage.
-- Tested on Python 3.6, 3.7, 3.8 and 3.9
+- Tested on Python 3.7, 3.8, 3.9, 3.10 and 3.11
 
 
 :doc:`Example <examples>`
diff --git a/docs/installation.rst b/docs/installation.rst
index 9daa66d9..9eab859d 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -6,9 +6,9 @@ Python version support
 ######################
 
 We recommend using the latest version of Python.
-Schedule is tested on Python 3.6, 3.7, 3.8 and 3.9
+Schedule is tested on Python 3.7, 3.8, 3.9, 3.10 and 3.11.
 
-Want to use Schedule on Python 2.7 or 3.5? Use version 0.6.0.
+Want to use Schedule on earlier Python versions? See the History.
 
 
 Dependencies
diff --git a/schedule/__init__.py b/schedule/__init__.py
index 8d02837d..74a2840b 100644
--- a/schedule/__init__.py
+++ b/schedule/__init__.py
@@ -15,7 +15,7 @@
     - A simple to use API for scheduling jobs.
     - Very lightweight and no external dependencies.
     - Excellent test coverage.
-    - Tested on Python 3.6, 3.7, 3.8, 3.9
+    - Tested on Python 3.7, 3.8, 3.9, 3.10 and 3.11
 
 Usage:
     >>> import schedule
@@ -223,7 +223,7 @@ class Job(object):
     method, which also defines its `interval`.
     """
 
-    def __init__(self, interval: int, scheduler: Scheduler = None):
+    def __init__(self, interval: int, scheduler: Optional[Scheduler] = None):
         self.interval: int = interval  # pause interval * unit between runs
         self.latest: Optional[int] = None  # upper limit to the interval
         self.job_func: Optional[functools.partial] = None  # the job job_func to run
@@ -465,7 +465,7 @@ def tag(self, *tags: Hashable):
         self.tags.update(tags)
         return self
 
-    def at(self, time_str: str, tz: str = None):
+    def at(self, time_str: str, tz: Optional[str] = None):
 
         """
         Specify a particular time that the job should be run at.
diff --git a/setup.py b/setup.py
index 819c8262..42b9975c 100644
--- a/setup.py
+++ b/setup.py
@@ -43,11 +43,12 @@ def read_file(filename):
         "Operating System :: OS Independent",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "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",
         "Natural Language :: English",
     ],
-    python_requires=">=3.6",
+    python_requires=">=3.7",
 )
diff --git a/tox.ini b/tox.ini
index 09d92c54..e27768e5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,14 +1,15 @@
 [tox]
-envlist = py3{6,7,8,9}{,-pytz}
+envlist = py3{7,8,9,10,11}{,-pytz}
 skip_missing_interpreters = true
 
 
 [gh-actions]
 python =
-    3.6: py36
     3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310
+    3.11: py311
 
 [testenv]
 deps =
@@ -34,4 +35,4 @@ commands = black --check .
 [testenv:setuppy]
 deps = -rrequirements-dev.txt
 commands =
-    python setup.py check --strict --metadata --restructuredtext
\ No newline at end of file
+    python setup.py check --strict --metadata --restructuredtext