diff --git a/.github/workflows/macos-linux-conda.yml b/.github/workflows/macos-linux-conda.yml
index e4821726115e405ec5784ef314c13018abfae127..79063d118ca1dc344a5386349baba9903cb86e7a 100644
--- a/.github/workflows/macos-linux-conda.yml
+++ b/.github/workflows/macos-linux-conda.yml
@@ -101,7 +101,8 @@ jobs:
           -DPYTHON_EXECUTABLE=$(which python3) \
           -DGENERATE_PYTHON_STUBS=ON \
           -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
-          -DCMAKE_CXX_FLAGS=${{ matrix.cxx_options }}
+          -DCMAKE_CXX_FLAGS=${{ matrix.cxx_options }} \
+          -DCMAKE_CXX_STANDARD=11
         cmake --build . -j3
         ctest --output-on-failure
         cmake --install .