diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9758443..9269594 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
         platform: ['macos-12', 'ubuntu-20.04', 'windows-2022']
     steps:
       - uses: actions/checkout@v4
diff --git a/meson.build b/meson.build
index 1bf614d..e055e9a 100644
--- a/meson.build
+++ b/meson.build
@@ -7,7 +7,7 @@ project(
   meson_version: '>= 1.0.0',
   default_options: [
     'buildtype=release',
-    'c_std=c99',
+    'c_std=c11',
   ]
 )
 
diff --git a/pyproject.toml b/pyproject.toml
index 59ae954..460a162 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,6 +31,7 @@ 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",
 ]