diff --git a/Makefile b/Makefile
index 9715b73..5a87eae 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,10 @@ $(VENV):
 	python -m venv .venv
 	$(VENV)/python -m pip install --upgrade pip
 
+#	For python 3 on Mac, uncomment below code
+#	python3 -m venv .venv
+#	$(VENV)/python3 -m pip install --upgrade pip
+
 $(VENV)/$(MARKER): $(VENVDEPS) | $(VENV)
 	$(VENV)/pip install $(foreach path,$(REQUIREMENTS),-r $(path))
 	touch $(VENV)/$(MARKER)
@@ -29,5 +33,11 @@ clean:
 serve:
 	$(VENV)/python -m http.server 8000
 
+#	For python 3 on Mac, uncomment below code
+#	$(VENV)/python3 -m http.server 8000
+
 test: install
 	$(NPM)/percy exec -- $(VENV)/python tests/todo.py
+
+#	For python 3 on Mac, uncomment below code
+#	$(NPM)/percy exec -- $(VENV)/python3 tests/todo.py
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 3f7c66d..a5ff456 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-selenium==3.*
+selenium==4.*
 percy-selenium==1.*
 requests==2.*
diff --git a/tests/todo.py b/tests/todo.py
index 8f080ad..668463a 100644
--- a/tests/todo.py
+++ b/tests/todo.py
@@ -7,7 +7,7 @@
 # start the example app in another thread
 httpd = HTTPServer(('localhost', 8000), SimpleHTTPRequestHandler)
 thread = Thread(target=httpd.serve_forever)
-thread.setDaemon(True)
+thread.daemon = True
 thread.start()
 
 # launch firefox headless
@@ -23,13 +23,13 @@
 percy_snapshot(browser, 'Empty Todo State')
 
 # snapshot with a new todo
-new_todo_input = browser.find_element_by_class_name('new-todo')
+new_todo_input = browser.find_element('class name', 'new-todo')
 new_todo_input.send_keys('Try Percy')
 new_todo_input.send_keys(Keys.ENTER)
 percy_snapshot(browser, 'With a Todo')
 
 # snapshot with a completed todo
-todo_toggle = browser.find_element_by_class_name('toggle')
+todo_toggle = browser.find_element('class name', 'toggle')
 todo_toggle.click()
 percy_snapshot(browser, 'Completed Todo')