diff --git a/.github/workflows/run-tests-push.yml b/.github/workflows/run-tests-push.yml
index 224c5ae9..410517a3 100644
--- a/.github/workflows/run-tests-push.yml
+++ b/.github/workflows/run-tests-push.yml
@@ -26,6 +26,8 @@ jobs:
         run: python -V
       - shell: bash -l {0}
         run: pip install -e .[develop]
+      - shell: bash -l {0}
+        run: conda list
       - shell: bash -l {0}
         run: |
           analysis_compare --help
@@ -38,6 +40,6 @@ jobs:
           bgcval2_make_report --help
           download_from_mass --help 
       - shell: bash -l {0}
-        run: pytest
+        run: pytest -n 2
       - shell: bash -l {0}
         run: sphinx-build -Ea doc doc/build
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 7b6937df..d82de3ae 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -31,6 +31,8 @@ jobs:
         run: python -V
       - shell: bash -l {0}
         run: pip install -e .[develop]
+      - shell: bash -l {0}
+        run: conda list
       - shell: bash -l {0}
         run: |
           analysis_compare --help
@@ -44,6 +46,6 @@ jobs:
           bgcval2_make_report --help
           download_from_mass --help
       - shell: bash -l {0}
-        run: pytest
+        run: pytest -n 2
       - shell: bash -l {0}
         run: sphinx-build -Ea doc doc/build
diff --git a/environment.yml b/environment.yml
index f2998d47..2fbd8a2a 100644
--- a/environment.yml
+++ b/environment.yml
@@ -11,7 +11,7 @@ dependencies:
   - matplotlib
   - nctoolkit >=0.8.7  # use linux64 build
   - netcdf4
-  - numpy >1.24.3,<2.0  # needs thorough checking when released
+  - numpy >=2.0.0
   - pip !=21.3
   - python >=3.9
   - pyyaml
diff --git a/setup.py b/setup.py
index 3d385086..a3de7d9a 100755
--- a/setup.py
+++ b/setup.py
@@ -30,7 +30,7 @@
         'matplotlib',
         'nctoolkit>=0.8.7',  # use linux64 build
         'netcdf4',
-        'numpy>1.24.3,<2.0',
+        'numpy>=2.0.0',
         'pip!=21.3',
         'pyyaml',
         'scikit-learn',