diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 02404fa8..52de0002 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        version: ["2.7", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        version:
+          ["2.7", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         include:
           - version: "2.7"
             container: python:2.7.18-buster
diff --git a/setup.cfg b/setup.cfg
index 0a127127..1ec4d377 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -22,6 +22,7 @@ classifiers =
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: Implementation :: PyPy
     Topic :: Multimedia :: Graphics
@@ -47,6 +48,7 @@ test =
     pytest
     pytest-cov
     requests_mock
+    multipart; python_version >= '3.13'
 
 lint =
     autoflake==2.3.1; python_version >= '3.8'
diff --git a/tests/utils.py b/tests/utils.py
index ebb6daf8..a40367c1 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -7,7 +7,6 @@
 import json
 import gazu.client
 import io
-import cgi
 
 
 def fakeid(string):
@@ -38,12 +37,30 @@ def add_verify_file_callback(mock, dict_assert={}, url=None):
     def verify_file_callback(request):
         if url is None or url == request.url:
             body_file = io.BytesIO(request.body)
-            _, pdict = cgi.parse_header(request.headers["Content-Type"])
-            if sys.version_info[0] == 3:
-                pdict["boundary"] = bytes(pdict["boundary"], "UTF-8")
+
+            if sys.version_info >= (3, 13):
+                import multipart
+
+                p = multipart.MultipartParser(
+                    body_file,
+                    boundary=bytes(
+                        multipart.parse_options_header(
+                            request.headers["Content-Type"]
+                        )[1]["boundary"],
+                        "UTF-8",
+                    ),
+                    charset="UTF-8",
+                )
+                parsed = {part.name: [part.raw] for part in p.parts()}
             else:
-                pdict["boundary"] = bytes(pdict["boundary"])
-            parsed = cgi.parse_multipart(fp=body_file, pdict=pdict)
+                import cgi
+
+                _, pdict = cgi.parse_header(request.headers["Content-Type"])
+                if sys.version_info[0] == 3:
+                    pdict["boundary"] = bytes(pdict["boundary"], "utf-8")
+                else:
+                    pdict["boundary"] = bytes(pdict["boundary"])
+                parsed = cgi.parse_multipart(fp=body_file, pdict=pdict)
             for key in dict_assert.keys():
                 assert key in parsed.keys()
                 if isinstance(parsed[key][0], bytes):