diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c6431264b..5daf3ddbe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -90,7 +90,6 @@ jobs:
       matrix:
         os:
           - macos-11
-          - macos-10.15
         config:
           - { name: "cmake_gcc", cc: "gcc", cxx: "g++" }
           - { name: "cmake_clang", cc: "clang", cxx: "clang++" }