diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 04d12009b..497fa2465 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -53,7 +53,7 @@ jobs:
         run : |
           conan profile new default --detect || true
           conan profile update settings.compiler.cppstd=20 default
-          conan profile update 'conf.tools.build:cxxflags+=["-DBOOST_ASIO_DISABLE_CONCEPTS"]' default
+          conan profile update 'conf.tools.build:cxxflags=[]' default
       - name: build
         uses: ./.github/actions/build
         with: