diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index d25ff7e..4d19951 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         os: [ubuntu-22.04, windows-2022]
     steps:
       - name: Checkout
diff --git a/pyproject.toml b/pyproject.toml
index ef2b6a4..cade71b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ authors = [
 dependencies = [
     "pygls>=1.1.1",
 ]
-requires-python = ">=3.8.0,<3.13"
+requires-python = ">=3.8.0,<=3.13"
 readme = "README.md"
 license = {text = "MIT"}
 keywords = ["cmake", "completion", "vim", "lsp"]
diff --git a/tox.ini b/tox.ini
index e53642e..5bcc0fc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-env_list = py{38,39,310,311,312}
+env_list = py{38,39,310,311,312,313}
 isolated_build = True
 passenv = *
 setenv =
@@ -12,6 +12,7 @@ python =
     3.10: py310
     3.11: py311
     3.12: py312
+    3.13: py313
 
 [testenv]
 allowlist_externals =