diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ed38b91..b281913 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,10 +17,10 @@ jobs:
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.10
+      - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version: '3.13'
       - name: Install dependencies
         run: |
             python -m pip install --upgrade pip
@@ -38,34 +38,34 @@ jobs:
       matrix:
         include:
           # Python versions
-          - name: Linux py37
-            os: ubuntu-latest
-            pyversion: '3.7'
-          - name: Linux py38
-            os: ubuntu-latest
-            pyversion: '3.8'
           - name: Linux py39
             os: ubuntu-latest
             pyversion: '3.9'
           - name: Linux py310
             os: ubuntu-latest
             pyversion: '3.10'
+          - name: Linux py311
+            os: ubuntu-latest
+            pyversion: '3.11'
           - name: Linux py312
             os: ubuntu-latest
             pyversion: '3.12'
+          - name: Linux py313
+            os: ubuntu-latest
+            pyversion: '3.13'
           - name: Linux pypy
             os: ubuntu-latest
             pyversion: 'pypy3.9'
           # OS's
-          - name: Linux py311
+          - name: Linux py313
             os: ubuntu-latest
-            pyversion: '3.11'
-          - name: Windows py311
+            pyversion: '3.13'
+          - name: Windows py313
             os: windows-latest
-            pyversion: '3.11'
-          - name: MacOS py311
+            pyversion: '3.13'
+          - name: MacOS py313
             os: macos-latest
-            pyversion: '3.11'
+            pyversion: '3.13'
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.pyversion }}
diff --git a/imageio_ffmpeg/_definitions.py b/imageio_ffmpeg/_definitions.py
index 9f6e39c..801fb1d 100644
--- a/imageio_ffmpeg/_definitions.py
+++ b/imageio_ffmpeg/_definitions.py
@@ -1,25 +1,27 @@
 import platform
 import struct
-import sys
 
 __version__ = "0.5.1"
 
 
 def get_platform():
     bits = struct.calcsize("P") * 8
-    if sys.platform.startswith("linux"):
+    if platform.system().lower().startswith("linux"):
         architecture = platform.machine()
         if architecture == "aarch64":
             return "linuxaarch64"
         return "linux{}".format(bits)
-    elif sys.platform.startswith("freebsd"):
+    elif platform.system().lower().startswith("freebsd"):
         return "freebsd{}".format(bits)
-    elif sys.platform.startswith("win"):
+    elif platform.system().lower().startswith("win"):
         return "win{}".format(bits)
-    elif sys.platform.startswith("cygwin"):
+    elif platform.system().lower().startswith("cygwin"):
         return "win{}".format(bits)
-    elif sys.platform.startswith("darwin"):
-        return "osx{}".format(bits)
+    elif platform.system().lower().startswith("darwin"):
+        if platform.processor().lower().startswith("arm"):  # Apple Silicon
+            return "osx-arm{}".format(bits)
+        else:
+            return "osx-{}".format(bits)
     else:  # pragma: no cover
         return None
 
@@ -34,7 +36,8 @@ def get_platform():
 
 # Platform string -> ffmpeg filename
 FNAME_PER_PLATFORM = {
-    "osx64": "ffmpeg-osx64-v4.2.2",  # 10.10+
+    "osx-arm64": "ffmpeg-osx-arm64-v7.0",  # Apple Silicon
+    "osx64": "ffmpeg-osx-x86-v7.0",  # 10.9+
     "win32": "ffmpeg-win32-v4.2.2.exe",  # Windows 7+
     "win64": "ffmpeg-win64-v4.2.2.exe",
     # "linux32": "ffmpeg-linux32-v4.2.2",
@@ -42,13 +45,15 @@ def get_platform():
     "linuxaarch64": "ffmpeg-linuxaarch64-v4.2.2",
 }
 
-osxplats = "macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64"
+osxplats = "macosx_10_9_intel.macosx_10_9_x86_64"
+osxarmplats = "macosx_11_0_arm64"
 
 # Wheel tag -> platform string
 WHEEL_BUILDS = {
     "py3-none-manylinux2010_x86_64": "linux64",
     "py3-none-manylinux2014_aarch64": "linuxaarch64",
-    "py3-none-" + osxplats: "osx64",
+    "py3-none-" + osxplats: "osx64",  # Apple Intel
+    "py3-none-" + osxarmplats: "osx-arm64",  # Apple Silicon
     "py3-none-win32": "win32",
     "py3-none-win_amd64": "win64",
 }
diff --git a/setup.py b/setup.py
index ee6b492..24fb6bd 100644
--- a/setup.py
+++ b/setup.py
@@ -56,7 +56,7 @@
     long_description=long_description,
     platforms="any",
     provides=["imageio_ffmpeg"],
-    python_requires=">=3.5",
+    python_requires=">=3.9",
     setup_requires=[],
     install_requires=[],
     packages=["imageio_ffmpeg", "imageio_ffmpeg.binaries"],
@@ -74,11 +74,10 @@
         "Operating System :: POSIX",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "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",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
     ],
 )