diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 61ceb58..cd4bfc8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,8 @@ jobs:
         - cxxflags: "-std=c++98"
         - cxxflags: "-std=c++11"
         - cxxflags: "-std=c++17"
-        - cxxflags: "-std=c++20"
+        # https://stackoverflow.com/questions/76859275/error-compiling-a-cpp-containing-stdchrono-errorstatic-constexpr-unsigned-fra
+        - cxxflags: "-std=c++20 -stdlib=libc++"
     steps:
       - name: Checkout
         uses: actions/checkout@v3