diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 6a3df7dc3..71825f78a 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -21,6 +21,7 @@ jobs:
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
         wx-version:
           - "4.1.1"
           - "4.2.1"
@@ -32,6 +33,10 @@ jobs:
             wx-version: "4.1.1"
           - python-version: "3.12"
             wx-version: "4.2.1"
+          - python-version: "3.13"
+            wx-version: "4.1.1"
+          - python-version: "3.13"
+            wx-version: "4.2.1"
 
     steps:
 
@@ -50,6 +55,8 @@ jobs:
           echo "add_dir_str=cpython-311" >> $GITHUB_ENV
         elif [ "${{ matrix.python-version }}" == "3.12" ]; then
           echo "add_dir_str=cpython-312" >> $GITHUB_ENV
+        elif [ "${{ matrix.python-version }}" == "3.13" ]; then
+          echo "add_dir_str=cpython-313" >> $GITHUB_ENV
         fi
 
     - name: Setup xvfb
diff --git a/DisplayCAL/RealDisplaySizeMM.py b/DisplayCAL/RealDisplaySizeMM.py
index e77dcb436..884063fc1 100644
--- a/DisplayCAL/RealDisplaySizeMM.py
+++ b/DisplayCAL/RealDisplaySizeMM.py
@@ -29,8 +29,8 @@
         from DisplayCAL.lib64.python311.RealDisplaySizeMM import *
     elif sys.version_info[:2] == (3, 12):
         from DisplayCAL.lib64.python312.RealDisplaySizeMM import *
-# else:
-#     pass
+    elif sys.version_info[:2] == (3, 13):
+        from DisplayCAL.lib64.python313.RealDisplaySizeMM import *
 
 # TODO: For Linux use the ``xrandr`` command output which supplies everything.
 #
diff --git a/DisplayCAL/freeze.py b/DisplayCAL/freeze.py
index ce81eb7fa..d17807672 100644
--- a/DisplayCAL/freeze.py
+++ b/DisplayCAL/freeze.py
@@ -182,7 +182,7 @@ def add_lib_excludes(key, excludebits):
         config["excludes"][key].extend([f"{name}.lib{exclude}", f"lib{exclude}"])
 
     for exclude in ("32", "64"):
-        for pycompat in ("38", "39", "310", "311"):
+        for pycompat in ("38", "39", "310", "311", "312", "313"):
             if key == "win32" and (
                 pycompat == str(sys.version_info[0]) + str(sys.version_info[1])
                 or exclude == excludebits[0]
@@ -463,6 +463,7 @@ def build_py2exe():
             "Programming Language :: Python :: 3.10",
             "Programming Language :: Python :: 3.11",
             "Programming Language :: Python :: 3.12",
+            "Programming Language :: Python :: 3.13",
             "Topic :: Multimedia :: Graphics",
         ],
         "data_files": data_files,
diff --git a/DisplayCAL/lib64/python313/__init__.py b/DisplayCAL/lib64/python313/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/DisplayCAL/meta.py b/DisplayCAL/meta.py
index c6f91484b..d42b15a25 100644
--- a/DisplayCAL/meta.py
+++ b/DisplayCAL/meta.py
@@ -54,7 +54,7 @@
 name_html = '<span class="appname">Display<span>CAL</span></span>'
 
 py_minversion = (3, 8)
-py_maxversion = (3, 12)
+py_maxversion = (3, 13)
 
 version = VERSION_STRING
 version_lin = VERSION_STRING  # Linux
diff --git a/DisplayCAL/safe_print.py b/DisplayCAL/safe_print.py
index 8f1b39052..2631ffe13 100644
--- a/DisplayCAL/safe_print.py
+++ b/DisplayCAL/safe_print.py
@@ -4,7 +4,7 @@
 import os
 import sys
 
-from DisplayCAL.encoding import get_encoding, get_encodings
+from DisplayCAL.encoding import get_encodings
 
 
 original_codepage = None
diff --git a/DisplayCAL/setup.py b/DisplayCAL/setup.py
index f639e6e10..496caf069 100644
--- a/DisplayCAL/setup.py
+++ b/DisplayCAL/setup.py
@@ -199,7 +199,7 @@ def add_lib_excludes(key, excludebits):
         config["excludes"][key].extend([f"{name}.lib{exclude}", f"lib{exclude}"])
 
     for exclude in ("32", "64"):
-        for pycompat in ("38", "39", "310", "311", "312"):
+        for pycompat in ("38", "39", "310", "311", "312", "313"):
             if key == "win32" and (
                 pycompat == str(sys.version_info[0]) + str(sys.version_info[1])
                 or exclude == excludebits[0]
@@ -990,7 +990,7 @@ def findall(
     packages = [name, f"{name}.lib", f"{name}.lib.agw"]
     if sdist:
         # For source distributions we want all libraries
-        for pycompat in ("38", "39", "310", "311", "312"):
+        for pycompat in ("38", "39", "310", "311", "312", "313"):
             packages.extend([f"{name}.lib{bits}", f"{name}.lib{bits}.python{pycompat}"])
     elif sys.platform == "darwin":
         # On Mac OS X we only want the universal binaries
@@ -1023,6 +1023,7 @@ def findall(
             "Programming Language :: Python :: 3.10",
             "Programming Language :: Python :: 3.11",
             "Programming Language :: Python :: 3.12",
+            "Programming Language :: Python :: 3.13",
             "Topic :: Multimedia :: Graphics",
         ],
         "data_files": data_files,
diff --git a/DisplayCAL/worker.py b/DisplayCAL/worker.py
index 4a0173681..f05f04364 100644
--- a/DisplayCAL/worker.py
+++ b/DisplayCAL/worker.py
@@ -12,7 +12,6 @@
 import math
 import mimetypes
 import os
-import pipes
 from io import BytesIO
 from pathlib import Path
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index e52c6c814..971af0809 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -19,5 +19,4 @@ pytest-github-actions-annotate-failures
 pytest-xdist
 snowballstemmer
 twine
-yappi
 wheel