diff --git a/.github/workflows/vcpkg_ci.yml b/.github/workflows/vcpkg_ci.yml
index e6a1ff9be..739e1c010 100644
--- a/.github/workflows/vcpkg_ci.yml
+++ b/.github/workflows/vcpkg_ci.yml
@@ -72,12 +72,9 @@ jobs:
       fail-fast: false
       matrix:
         os: [
-          'macos-10.15',
           'macos-11.0'
           ]
         llvm: [
-          '9',
-          '10',
           '11'
           ]