diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 880a8785d92bfc7cf23809330607ab15891f4953..e7fb33d6e64580c6204a8b419a4751aefee03c66 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -21,8 +21,8 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - { os: ubuntu-18.04,   target: linux,   platform: linux-x64    }
-          - { os: ubuntu-18.04,   target: linux,   platform: linux-arm64    }
+          - { os: ubuntu-20.04,   target: linux,   platform: linux-x64    }
+          - { os: ubuntu-20.04,   target: linux,   platform: linux-arm64    }
           - { os: macos-11,       target: darwin,  platform: darwin-x64   }
           - { os: macos-11,       target: darwin,  platform: darwin-arm64 }
           - { os: windows-latest, target: windows, platform: win32-ia32   }