diff --git a/.github/workflows/run_tests_ci.yml b/.github/workflows/run_tests_ci.yml
index f1b5c4a9..83252060 100644
--- a/.github/workflows/run_tests_ci.yml
+++ b/.github/workflows/run_tests_ci.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9']
+        python-version: ['3.7', '3.8', '3.9']
         pygame-version: ['2.0.1', '2.1.0', '2.1.2']
     steps:
     - uses: actions/checkout@v1
diff --git a/.travis.yml b/.travis.yml
index 333ea2af..52346e93 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -54,12 +54,6 @@ jobs:
         - python --version
       env: PYGAME_VERSION=2.0.0
 
-    - os: linux
-      python: 3.6
-      env: PYGAME_VERSION=2.0.1
-    - os: linux
-      python: 3.6
-      env: PYGAME_VERSION=2.1.0
     - os: linux
       python: 3.7
       env: PYGAME_VERSION=2.0.1
diff --git a/README.md b/README.md
index 364a7a59..c49cfeba 100644
--- a/README.md
+++ b/README.md
@@ -8,10 +8,10 @@ A GUI system for pygame 2.
  - [Examples](https://github.com/MyreMylar/pygame_gui_examples)
  - [PyPi](https://pypi.org/project/pygame-gui/)
 
-[![pypi](https://badge.fury.io/py/pygame-gui.svg)](https://pypi.python.org/pypi/pygame-gui) [![Documentation Status](https://readthedocs.org/projects/pygame-gui/badge/?version=latest)](https://pygame-gui.readthedocs.io/en/latest/?badge=latest) [![Python 3.6+](https://img.shields.io/badge/python-3.6+-blue.svg)](https://www.python.org/downloads/release/python-360/) [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT) [![Master](https://travis-ci.com/MyreMylar/pygame_gui.svg?branch=master)](https://travis-ci.com/MyreMylar/pygame_gui) [![codecov](https://codecov.io/gh/MyreMylar/pygame_gui/branch/main/graph/badge.svg?token=zZhkvhgTki)](https://codecov.io/gh/MyreMylar/pygame_gui) [![Downloads](https://pepy.tech/badge/pygame-gui)](https://pepy.tech/project/pygame-gui)
+[![pypi](https://badge.fury.io/py/pygame-gui.svg)](https://pypi.python.org/pypi/pygame-gui) [![Documentation Status](https://readthedocs.org/projects/pygame-gui/badge/?version=latest)](https://pygame-gui.readthedocs.io/en/latest/?badge=latest) [![Python 3.7+](https://img.shields.io/badge/python-3.7+-blue.svg)](https://www.python.org/downloads/release/python-360/) [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT) [![Master](https://travis-ci.com/MyreMylar/pygame_gui.svg?branch=master)](https://travis-ci.com/MyreMylar/pygame_gui) [![codecov](https://codecov.io/gh/MyreMylar/pygame_gui/branch/main/graph/badge.svg?token=zZhkvhgTki)](https://codecov.io/gh/MyreMylar/pygame_gui) [![Downloads](https://pepy.tech/badge/pygame-gui)](https://pepy.tech/project/pygame-gui)
 ## Requirements
 
- - Python 3.6+
+ - Python 3.7+
  - Pygame 2.0.1+
  - python-i18n (does localization to different languages)
 
diff --git a/pygame_gui/windows/ui_file_dialog.py b/pygame_gui/windows/ui_file_dialog.py
index eaa9e475..f8590bf8 100644
--- a/pygame_gui/windows/ui_file_dialog.py
+++ b/pygame_gui/windows/ui_file_dialog.py
@@ -1,6 +1,6 @@
 import warnings
 
-from typing import Union, List, Optional
+from typing import Union, List, Optional, Set
 from pathlib import Path
 
 import pygame
@@ -38,7 +38,7 @@ def __init__(self,
                  rect: pygame.Rect,
                  manager: Optional[IUIManagerInterface],
                  window_title: str = 'pygame-gui.file_dialog_title_bar',
-                 allowed_suffixes: set[str] = {""},
+                 allowed_suffixes: Set[str] = {""},
                  initial_file_path: Optional[str] = None,
                  object_id: Union[ObjectID, str] = ObjectID('#file_dialog', None),
                  allow_existing_files_only: bool = False,
diff --git a/setup.py b/setup.py
index 8b92d21c..0c0d1b02 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
                 'pygame_gui.data',
                 'pygame_gui.data.translations'],
       zip_safe=False,
-      python_requires='>=3.6',
+      python_requires='>=3.7',
       setup_requires=[],
       install_requires=['pygame>=2.0.1',
                         'python-i18n>=0.3.9',
@@ -38,7 +38,6 @@
           'Intended Audience :: Developers',
           'Topic :: Software Development :: Build Tools',
           'License :: OSI Approved :: MIT License',
-          'Programming Language :: Python :: 3.6',
           'Programming Language :: Python :: 3.7',
           'Programming Language :: Python :: 3.8',
           'Programming Language :: Python :: 3.9',