diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0710862..d2a3e2d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,13 +33,13 @@ jobs:
         if [[ "${{ github.event_name }}" == "schedule" || "${{ github.head_ref }}" =~ ^release_ ]]; then \
           echo "matrix={ \
             \"os\": [ \"ubuntu-latest\", \"macos-latest\", \"windows-latest\" ], \
-            \"python-version\": [ \"3.8\", \"3.9\", \"3.10\", \"3.11\", \"3.12\" ], \
+            \"python-version\": [ \"3.8\", \"3.9\", \"3.10\", \"3.11\", \"3.12\", \"3.13\" ], \
             \"package_level\": [ \"minimum\", \"latest\" ] \
           }" >> $GITHUB_OUTPUT; \
         else \
           echo "matrix={ \
             \"os\": [ \"ubuntu-latest\" ], \
-            \"python-version\": [ \"3.8\", \"3.12\" ], \
+            \"python-version\": [ \"3.8\", \"3.13\" ], \
             \"package_level\": [ \"minimum\", \"latest\" ], \
             \"include\": [ \
               { \
@@ -64,7 +64,7 @@ jobs:
               }, \
               { \
                 \"os\": \"macos-latest\", \
-                \"python-version\": \"3.12\", \
+                \"python-version\": \"3.13\", \
                 \"package_level\": \"minimum\" \
               }, \
               { \
@@ -74,7 +74,7 @@ jobs:
               }, \
               { \
                 \"os\": \"windows-latest\", \
-                \"python-version\": \"3.12\", \
+                \"python-version\": \"3.13\", \
                 \"package_level\": \"minimum\" \
               } \
             ] \
diff --git a/base-requirements.txt b/base-requirements.txt
index 124794c..4ae4dcd 100644
--- a/base-requirements.txt
+++ b/base-requirements.txt
@@ -8,4 +8,4 @@
 pip>=23.3
 setuptools>=70.0.0
 setuptools-scm[toml]>=8.1.0
-wheel>=0.38.1
+wheel>=0.41.3
diff --git a/dev-requirements.txt b/dev-requirements.txt
index d4187f7..f2defb5 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -18,16 +18,23 @@ pytest-cov>=2.7.0
 coveralls>=3.3.0
 
 # Safety CI by pyup.io
-# Safety 3.0.0 requires exact versions of authlib==1.2.0 and jwt==1.3.1.
-safety>=3.0.1
+# Safety 3.0.x pins pydantic to <2.0, preventing bug fixes.
+# pydantic 2.8.0 fixes an install issue on Python 3.13.
+safety>=3.1.0
+safety-schemas>=0.0.2,!=0.0.7
+pydantic>=2.8.0
 
 # Click is used by safety
 # safety 2.2.0 requires Click >=8.0.2
 Click>=8.0.2
 
 # PyYAML is pulled in by dparse
-# PyYAML 5.3.1 addressed issue 38100 reported by safety
-PyYAML>=5.3.1
+# PyYAML is also pulled in by dparse and python-coveralls
+# PyYAML 6.0 has wheel archives for Python 3.6 - 3.11
+# PyYAML 6.0.0 fails install since Cython 3 was released, see issue
+#   https://github.com/yaml/pyyaml/issues/724.
+# PyYAML 6.0.2 provides wheel archives for Python 3.13 on Windows
+PyYAML>=6.0.2
 
 # Tox
 # tox 3.17 requires six>=1.14.0 - covered in requirements.txt
@@ -54,7 +61,7 @@ sphinxcontrib-serializinghtml>=1.1.5; python_version == '3.8'
 sphinxcontrib-serializinghtml>=1.1.9; python_version >= '3.9'
 sphinxcontrib-websupport>=1.2.4
 autodocsumm>=0.2.12
-Babel>=2.9.1
+Babel>=2.11.0
 
 # PyLint (no imports, invoked via pylint script)
 pylint>=3.0.1
diff --git a/docs/changes.rst b/docs/changes.rst
index 3e53337..4d8c34c 100644
--- a/docs/changes.rst
+++ b/docs/changes.rst
@@ -35,6 +35,9 @@ Released: not yet
 
 **Enhancements:**
 
+* Added support for Python 3.13. This required increasing the minimum version
+  of several packages needed for development. (issue #203)
+
 * Added '__version_tuple__' with the integer versions. (related to issue #152)
 
 * Dev: Changed from setup.py to using pyproject.toml. (issue #152)
diff --git a/minimum-constraints-develop.txt b/minimum-constraints-develop.txt
index 3147065..81cac67 100644
--- a/minimum-constraints-develop.txt
+++ b/minimum-constraints-develop.txt
@@ -26,14 +26,14 @@ pytest-cov==2.7.0
 coveralls==3.3.0
 
 # Safety CI by pyup.io
-safety==3.0.1
-safety-schemas==0.0.1
+safety==3.1.0
+safety-schemas==0.0.2
 # TODO: Change to dparse 0.6.4 once released
 dparse==0.6.4b0
 ruamel.yaml==0.17.21
 Authlib==1.3.1
 marshmallow==3.15.0
-pydantic==1.10.13
+pydantic==2.8.0
 typer==0.12.0
 typer-cli==0.12.0
 typer-slim==0.12.0
@@ -43,7 +43,7 @@ psutil==6.0.0
 Click==8.0.2
 
 # PyYAML is pulled in by dparse
-PyYAML==5.3.1
+PyYAML==6.0.2
 
 # Tox
 tox==3.21.0
@@ -66,7 +66,7 @@ sphinxcontrib-serializinghtml==1.1.5; python_version == '3.8'
 sphinxcontrib-serializinghtml==1.1.9; python_version >= '3.9'
 sphinxcontrib-websupport==1.2.4
 autodocsumm==0.2.12
-Babel==2.9.1
+Babel==2.11.0
 
 # PyLint (no imports, invoked via pylint script)
 pylint>=3.0.1
@@ -138,8 +138,8 @@ py==1.11.0
 pydantic==1.10.13
 pyparsing==2.4.7
 python-dateutil==2.6.0
-pyzmq==16.0.4; python_version <= '3.11'
-pyzmq==25.1.1; python_version >= '3.12'
+# pyzmq 26.1.0 added wheel archives for Python 3.13
+pyzmq==26.1.0
 requests==2.32.2
 requests-mock==1.6.0
 requests-toolbelt==0.8.0
diff --git a/minimum-constraints-install.txt b/minimum-constraints-install.txt
index 751b678..086b696 100644
--- a/minimum-constraints-install.txt
+++ b/minimum-constraints-install.txt
@@ -11,7 +11,7 @@ pip==23.3
 setuptools==70.0.0
 # Note on not specifying 'setuptools-scm[toml]': Extras cannot be in constraints files
 setuptools-scm==8.1.0
-wheel==0.38.1
+wheel==0.41.3
 
 
 # Direct dependencies for installation (must be consistent with requirements.txt)
diff --git a/pyproject.toml b/pyproject.toml
index bc4d17b..c35e39d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ requires = [
     # minimum-constraints-install.txt
     "setuptools>=70.0.0",
     "setuptools-scm[toml]>=8.1.0",
-    "wheel>=0.38.1"
+    "wheel>=0.41.3"
 ]
 build-backend = "setuptools.build_meta"
 
@@ -49,6 +49,7 @@ classifiers = [
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',
     'Programming Language :: Python :: 3.12',
+    'Programming Language :: Python :: 3.13',
     'Topic :: Software Development :: Libraries :: Python Modules',
 ]
 requires-python = ">=3.8"
diff --git a/tox.ini b/tox.ini
index 7d0e3bd..2b65433 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@ envlist =
     py310
     py311
     py312
+    py313
     win64_py38_32
     win64_py38_64
     win64_py39_32
@@ -23,11 +24,14 @@ envlist =
     win64_py311_64
     win64_py312_32
     win64_py312_64
+    win64_py313_32
+    win64_py313_64
     cygwin64_py38
     cygwin64_py39
     cygwin64_py310
     cygwin64_py311
     cygwin64_py312
+    cygwin64_py313
 
 # For Appveyor, missing interpreters should fail. For local use, you may
 # want to allow to skip missing interpreters.
@@ -97,6 +101,10 @@ basepython = python3.11
 platform = linux2|darwin
 basepython = python3.12
 
+[testenv:py313]
+platform = linux2|darwin
+basepython = python3.13
+
 # Note: The basepython file paths for the win64* tox environments may need to
 #       be customized.
 
@@ -140,6 +148,14 @@ basepython = C:\Python312\python.exe
 platform = win32
 basepython = C:\Python312-x64\python.exe
 
+[testenv:win64_py313_32]
+platform = win32
+basepython = C:\Python313\python.exe
+
+[testenv:win64_py313_64]
+platform = win32
+basepython = C:\Python313-x64\python.exe
+
 # Note: The 32-bit versions of CygWin do not work:
 # - On Python 3.6 and upwards, Tox returns success but does not do anything.
 
@@ -162,3 +178,7 @@ basepython = python3.11
 [testenv:cygwin64_py312]
 platform = cygwin
 basepython = python3.12
+
+[testenv:cygwin64_py313]
+platform = cygwin
+basepython = python3.13