diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f163630..eb3bd68 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       max-parallel: 5
       matrix:
-        python-version: [ '3.11',"3.12","3.13" ]
+        python-version: [ "3.11","3.12" ]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
diff --git a/pyproject.toml b/pyproject.toml
index 20d6179..2459681 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ classifiers=[
 	'Topic :: Scientific/Engineering :: Astronomy',
 	'Topic :: Software Development :: Libraries :: Python Modules',
 ]
-requires-python = ">=3.11"
+requires-python = ">=3.11,<3.13"
 dependencies = [
 	"astropy>=5.3.1",
 	"astroquery>=0.4.6",