diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 2fa9f71..b1234c1 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -22,11 +22,11 @@ jobs:
                 fitsio-version: ['==1.1.6']  # fuji+guadalupe version
                 numpy-version: ['<1.23']  # to keep asscalar, used by astropy
                 include:
-                  - os: [ubuntu-latest]
+                  - os: ubuntu-latest
                     python-version: '3.10'
                     astropy-version: '<7'
                     fitsio-version: '==1.2.4'
-                    numpy-version: '2.1.3'
+                    numpy-version: '==2.1.3'
 
         steps:
             - name: Checkout code