diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index 6b0e0f4..ce739e0 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -16,6 +16,9 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4
 
+    - name: Update apt
+      run: sudo apt-get update
+
     - name: Install netcdf
       run: sudo apt-get install libnetcdf-dev