diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index c56617c..b546946 100755
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -23,7 +23,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v3
       with:
-        python-version: '==3.12.3'
+        python-version: '3.x'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/requirements.txt b/requirements.txt
index 199c314..d9d89d1 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 Cython==3.0.10
-numpy<2
+numpy==2.0.0
 pandas
 scipy
 perturb-tools>=0.2.5
diff --git a/setup.py b/setup.py
index 44bfe10..ca388aa 100755
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@
     url="https://github.com/pinellolab/crispr-bean",
     packages=find_namespace_packages(),
     ext_modules=cythonize(
-        ["bean/mapping/CRISPResso2Align.pyx"]}
+        ["bean/mapping/CRISPResso2Align.pyx"], compiler_directives={"language_level": 2}
     ),
     include_dirs=np.get_include(),
     setup_requires=[