diff --git a/.github/workflows/ci-conan.yml b/.github/workflows/ci-conan.yml
index b6f6254c..58597a85 100644
--- a/.github/workflows/ci-conan.yml
+++ b/.github/workflows/ci-conan.yml
@@ -102,7 +102,7 @@ jobs:
                   cxx: "clang++-17",
                 },
               lib: "libc++",
-              conan-config: "",
+              conan-config: "-o cxx_modules=True",
             }
           - {
               name: "Apple Clang 15",
@@ -114,7 +114,7 @@ jobs:
                   cc: "clang",
                   cxx: "clang++",
                 },
-              conan-config: "",
+              conan-config: "-o cxx_modules=True",
             }
         build_type: ["Release", "Debug"]
 
diff --git a/.github/workflows/ci-test-package-cmake.yml b/.github/workflows/ci-test-package-cmake.yml
index ea9afa96..5670b0e1 100644
--- a/.github/workflows/ci-test-package-cmake.yml
+++ b/.github/workflows/ci-test-package-cmake.yml
@@ -98,7 +98,7 @@ jobs:
                   cxx: "clang++-17",
                 },
               lib: "libc++",
-              conan-config: "",
+              conan-config: "-o cxx_modules=True",
             }
           - {
               name: "Apple Clang 15",
@@ -110,7 +110,7 @@ jobs:
                   cc: "clang",
                   cxx: "clang++",
                 },
-              conan-config: "",
+              conan-config: "-o cxx_modules=True",
             }
         build_type: ["Release", "Debug"]