diff --git a/.github/workflows/CI_build.yml b/.github/workflows/CI_build.yml
index 483fd0b..19995f0 100644
--- a/.github/workflows/CI_build.yml
+++ b/.github/workflows/CI_build.yml
@@ -93,7 +93,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
-        python-version: ['3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12']
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
diff --git a/pyproject.toml b/pyproject.toml
index 604a444..bdae48c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ license = "MIT"
 readme = "README.md"
 
 [tool.poetry.dependencies]
-python = "^3.10"
+python = ">=3.10, <3.13"
 numba = "^0.60.0"
 numpy = "^2.0.0"
 scipy = "^1.14.1"