diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a1b57c44..90e8efe5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,6 +19,8 @@ jobs:
         os: [ubuntu-latest, macos-14]
         version:
           - { python: '3.12', resolution: highest }
+          - { python: '3.12', resolution: lowest-direct }
+          - { python: '3.13', resolution: highest }
           - { python: '3.13', resolution: lowest-direct }
     runs-on: ${{ matrix.os }}
 
@@ -37,7 +39,12 @@ jobs:
       - name: Install torch_sim
         run: |
           uv pip install "torch>2" --index-url https://download.pytorch.org/whl/cpu --system
-          uv pip install -e ".[test]" --resolution=${{ matrix.version.resolution }} --system
+          # always use numpy>=2 with Python 3.13
+          if [ "${{ matrix.version.python }}" = "3.13" ]; then
+            uv pip install -e ".[test]" "numpy>=2" --resolution=${{ matrix.version.resolution }} --system
+          else
+            uv pip install -e ".[test]" --resolution=${{ matrix.version.resolution }} --system
+          fi
 
       - name: Run core tests
         run: |
@@ -56,6 +63,8 @@ jobs:
         os: [ubuntu-latest, macos-14]
         version:
           - { python: '3.12', resolution: highest }
+          - { python: '3.12', resolution: lowest-direct }
+          - { python: '3.13', resolution: highest }
           - { python: '3.13', resolution: lowest-direct }
         model:
           - { name: fairchem, test_path: "tests/models/test_fairchem.py" }
@@ -72,8 +81,12 @@ jobs:
         exclude:
           - version: { python: '3.13', resolution: lowest-direct }
             model: { name: orb, test_path: "tests/models/test_orb.py" }
+          - version: { python: '3.13', resolution: highest }
+            model: { name: orb, test_path: "tests/models/test_orb.py" }
           - version: { python: '3.13', resolution: lowest-direct }
             model: { name: fairchem-legacy, test_path: "tests/models/test_fairchem_legacy.py" }
+          - version: { python: '3.13', resolution: highest }
+            model: { name: fairchem-legacy, test_path: "tests/models/test_fairchem_legacy.py" }
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -116,7 +129,12 @@ jobs:
       - name: Install torch_sim with model dependencies
         if: ${{ matrix.model.name != 'fairchem-legacy' }}
         run: |
-          uv pip install -e ".[test,${{ matrix.model.name }}]" --resolution=${{ matrix.version.resolution }} --system
+          # always use numpy>=2 with Python 3.13
+          if [ "${{ matrix.version.python }}" = "3.13" ]; then
+            uv pip install -e ".[test,${{ matrix.model.name }}]" "numpy>=2" --resolution=${{ matrix.version.resolution }} --system
+          else
+            uv pip install -e ".[test,${{ matrix.model.name }}]" --resolution=${{ matrix.version.resolution }} --system
+          fi
 
       - name: Run ${{ matrix.model.test_path }} tests
         if: ${{ !contains(matrix.model.name, 'fairchem') || github.event.pull_request.head.repo.fork == false }}
diff --git a/pyproject.toml b/pyproject.toml
index dcf548b1..850f35b6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ classifiers = [
 requires-python = ">=3.12"
 dependencies = [
     "h5py>=3.12.1",
-    "numpy>=2",
+    "numpy>=1.26,<3",
     "tables>=3.10.2",
     "torch>=2",
     "tqdm>=4.67",