diff --git a/.github/workflows/linux_and_macos.yml b/.github/workflows/linux_and_macos.yml
index 43023dc3..bba25414 100644
--- a/.github/workflows/linux_and_macos.yml
+++ b/.github/workflows/linux_and_macos.yml
@@ -26,6 +26,7 @@ jobs:
     - uses: actions/checkout@v2
     - name: build
       run: |
+        sudo apt update
         sudo apt install pkg-config git gfortran libopenmpi-dev \
           zlib1g zlib1g-dev libblas-dev libfftw3-dev libhdf5-openmpi-dev