diff --git a/PlotDevice.xcodeproj/project.pbxproj b/PlotDevice.xcodeproj/project.pbxproj
index ba4bca4..1464ae4 100644
--- a/PlotDevice.xcodeproj/project.pbxproj
+++ b/PlotDevice.xcodeproj/project.pbxproj
@@ -607,7 +607,7 @@
 				INFOPLIST_FILE = app/info.plist;
 				INSTALL_PATH = /Applications;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @executable_path/../Frameworks/Python.framework";
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				ONLY_ACTIVE_ARCH = NO;
 				OTHER_LDFLAGS = "$(inherited)";
 				PRODUCT_BUNDLE_IDENTIFIER = io.plotdevice.PlotDevice;
@@ -625,6 +625,7 @@
 				CODE_SIGN_IDENTITY = "-";
 				COMBINE_HIDPI_IMAGES = YES;
 				CONFIGURATION_BUILD_DIR = dist;
+				COPY_PHASE_STRIP = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_HARDENED_RUNTIME = YES;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -637,7 +638,7 @@
 				INFOPLIST_FILE = app/info.plist;
 				INSTALL_PATH = /Applications;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @executable_path/../Frameworks/Python.framework";
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				OTHER_LDFLAGS = "$(inherited)";
 				PRODUCT_BUNDLE_IDENTIFIER = io.plotdevice.PlotDevice;
 				PRODUCT_NAME = PlotDevice;
diff --git a/app/python.xcconfig b/app/python.xcconfig
index 697f55d..868ff60 100644
--- a/app/python.xcconfig
+++ b/app/python.xcconfig
@@ -1,7 +1,7 @@
 // Generated by deps/frameworks/config.py
 PYTHON_FRAMEWORK = $(PROJECT_DIR)/deps/frameworks/Python.framework
-PYTHON = $(PYTHON_FRAMEWORK)/Versions/3.11/bin/python3
-LIBRARY_SEARCH_PATHS = $(inherited) $(PYTHON_FRAMEWORK)/Versions/3.11/lib/python3.11/config-3.11-darwin
-HEADER_SEARCH_PATHS = $(inherited) $(PYTHON_FRAMEWORK)/Versions/3.11/include/python3.11
-OTHER_LDFLAGS = $(inherited) -lpython3.11
+PYTHON = $(PYTHON_FRAMEWORK)/Versions/3.13/bin/python3
+LIBRARY_SEARCH_PATHS = $(inherited) $(PYTHON_FRAMEWORK)/Versions/3.13/lib/python3.13/config-3.13-darwin
+HEADER_SEARCH_PATHS = $(inherited) $(PYTHON_FRAMEWORK)/Versions/3.13/include/python3.13
+OTHER_LDFLAGS = $(inherited) -lpython3.13
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) PYTHON_BIN="$(PYTHON)" PY3K=1
\ No newline at end of file
diff --git a/deps/frameworks/Makefile b/deps/frameworks/Makefile
index 3a48160..788b538 100644
--- a/deps/frameworks/Makefile
+++ b/deps/frameworks/Makefile
@@ -1,4 +1,4 @@
-PYTHON_VERSION = 3.11.9
+PYTHON_VERSION = 3.13.3
 FRAMEWORK_REPO = https://github.com/gregneagle/relocatable-python.git
 BUILD_OPTS = --os-version=11 --python-version=$(PYTHON_VERSION) --upgrade-pip --pip-requirements=requirements.txt
 BIN = ./Python.framework/Versions/Current/bin
@@ -11,6 +11,7 @@ PIP_INCLUDES = $(shell $(BIN)/python3-config --includes)
 
 all: Python.framework
 	$(PIP_ENV) CFLAGS="$(PIP_INCLUDES)" $(BIN)/pip3 install --upgrade ../..
+	find $(shell find ./Python.framework -name py2app -type d) -name main-\* -not -name \*universal2 -delete
 
 Python.framework: relocatable-python
 	PYTHONNOUSERSITE=1 $(PIP_ENV) python3 ./relocatable-python/make_relocatable_python_framework.py $(BUILD_OPTS)
diff --git a/deps/frameworks/requirements.txt b/deps/frameworks/requirements.txt
index 8c84793..150f105 100644
--- a/deps/frameworks/requirements.txt
+++ b/deps/frameworks/requirements.txt
@@ -2,6 +2,7 @@
 xattr
 cachecontrol[filecache]
 cffi
-pyobjc==8.5.1
+pyobjc==11.0
+py2app
 requests
 six
\ No newline at end of file
diff --git a/plotdevice/gfx/image.py b/plotdevice/gfx/image.py
index c413681..8817cf0 100644
--- a/plotdevice/gfx/image.py
+++ b/plotdevice/gfx/image.py
@@ -10,7 +10,7 @@
 
 from plotdevice import DeviceError
 from ..util import _copy_attrs, autorelease
-from ..util.readers import HTTP, last_modified
+from ..util.readers import get_http_session, last_modified
 from ..lib.io import MovieExportSession, ImageExportSession
 from .geometry import Region, Size, Point, Transform, CENTER
 from .atoms import TransformMixin, EffectsMixin, FrameMixin, Grob
@@ -123,7 +123,7 @@ def _lazyload(self, path=None, data=None):
             if re.match(r'https?:', path):
                 # load from url
                 key = err_info = path
-                resp = HTTP.get(path)
+                resp = get_http_session().get(path)
                 mtime = last_modified(resp)
                 # return a cached image if possible...
                 if path in _cache and _cache[path][1] >= mtime:
diff --git a/plotdevice/gui/editor.py b/plotdevice/gui/editor.py
index 3f2393c..7d8044b 100644
--- a/plotdevice/gui/editor.py
+++ b/plotdevice/gui/editor.py
@@ -2,13 +2,10 @@
 import os
 import re
 import json
-import cgi
 import objc
 from io import open
 from objc import super
-from pprint import pprint
 from time import time
-from bisect import bisect
 from ..lib.cocoa import *
 from plotdevice.gui.preferences import get_default, editor_info
 from plotdevice.gui import bundle_path, set_timeout
diff --git a/plotdevice/run/__init__.py b/plotdevice/run/__init__.py
index c1e02f3..5dc8ec2 100644
--- a/plotdevice/run/__init__.py
+++ b/plotdevice/run/__init__.py
@@ -5,6 +5,7 @@
 try:
     # test the sys.path by attempting to load a PyObjC submodule...
     from Foundation import *
+    import objc
 except ImportError:
     # detect whether we're being run from the repository and set up a local env if so
     repo = abspath(join(dirname(__file__), '../..'))
@@ -17,6 +18,7 @@
             call([sys.executable, setup_py, 'dev'])
         site.addsitedir(local_libs)
         from Foundation import *
+        import objc
     else:
         from pprint import pformat
         missing = "Searched for PyObjC libraries in:\n%s\nto no avail..."%pformat(sys.path)
@@ -28,4 +30,4 @@
 # expose the script-runner object
 from .sandbox import Sandbox
 
-__all__ = ('objc', 'encoding', 'Sandbox')
\ No newline at end of file
+__all__ = ('objc', 'encoded', 'Sandbox')
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 22165f7..61b181a 100644
--- a/setup.py
+++ b/setup.py
@@ -506,10 +506,10 @@ def codesign(root, name=None, exec=False, entitlement=False):
     install_requires = [
         'requests',
         'cachecontrol[filecache]',
-        'pyobjc-core==8.5.1',
-        'pyobjc-framework-Quartz==8.5.1',
-        'pyobjc-framework-LaunchServices==8.5.1',
-        'pyobjc-framework-WebKit==8.5.1',
+        'pyobjc-core==11.0',
+        'pyobjc-framework-Quartz==11.0',
+        'pyobjc-framework-LaunchServices==11.0',
+        'pyobjc-framework-WebKit==11.0',
     ],
     scripts = ["app/plotdevice"],
     zip_safe=False,
diff --git a/tests/compositing.py b/tests/compositing.py
index 6c73e1b..5db3274 100644
--- a/tests/compositing.py
+++ b/tests/compositing.py
@@ -111,5 +111,5 @@ def test_beginclip(self):
 
 def suite():
   suite = unittest.TestSuite()
-  suite.addTest(unittest.makeSuite(CompositingTests))
+  suite.addTest(unittest.defaultTestLoader.loadTestsFromTestCase(CompositingTests))
   return suite
diff --git a/tests/drawing.py b/tests/drawing.py
index 8769369..1d0dbe1 100644
--- a/tests/drawing.py
+++ b/tests/drawing.py
@@ -479,5 +479,5 @@ def test_strokewidth(self):
 
 def suite():
   suite = unittest.TestSuite()
-  suite.addTest(unittest.makeSuite(DrawingTests))
+  suite.addTest(unittest.defaultTestLoader.loadTestsFromTestCase(DrawingTests))
   return suite
diff --git a/tests/geometry.py b/tests/geometry.py
index cbbcec2..4819798 100644
--- a/tests/geometry.py
+++ b/tests/geometry.py
@@ -247,5 +247,5 @@ def test_push(self):
 
 def suite():
   suite = unittest.TestSuite()
-  suite.addTest(unittest.makeSuite(GeometryTests))
+  suite.addTest(unittest.defaultTestLoader.loadTestsFromTestCase(GeometryTests))
   return suite
diff --git a/tests/module.py b/tests/module.py
index 9a13100..77a30bb 100644
--- a/tests/module.py
+++ b/tests/module.py
@@ -35,9 +35,9 @@ def test_cli(self):
 
 
 def suite():
-    from unittest import TestSuite, makeSuite
+    from unittest import TestSuite, defaultTestLoader
 
     suite = TestSuite()
-    suite.addTest(makeSuite(ModuleTests))
+    suite.addTest(defaultTestLoader.loadTestsFromTestCase(ModuleTests))
 
     return suite
\ No newline at end of file
diff --git a/tests/primitives.py b/tests/primitives.py
index 1c31dd3..4fcf41c 100644
--- a/tests/primitives.py
+++ b/tests/primitives.py
@@ -160,5 +160,5 @@ def test_star(self):
 
 def suite():
   suite = unittest.TestSuite()
-  suite.addTest(unittest.makeSuite(PrimitivesTests))
+  suite.addTest(unittest.defaultTestLoader.loadTestsFromTestCase(PrimitivesTests))
   return suite
diff --git a/tests/typography.py b/tests/typography.py
index bc30adb..2f777dc 100644
--- a/tests/typography.py
+++ b/tests/typography.py
@@ -494,5 +494,5 @@ def test_line_fragment(self):
 
 def suite():
   suite = unittest.TestSuite()
-  suite.addTest(unittest.makeSuite(TypographyTests))
+  suite.addTest(unittest.defaultTestLoader.loadTestsFromTestCase(TypographyTests))
   return suite