diff --git a/.github/workflows/build-simpleplugin.yml b/.github/workflows/build-simpleplugin.yml
index 8801212..1726e90 100644
--- a/.github/workflows/build-simpleplugin.yml
+++ b/.github/workflows/build-simpleplugin.yml
@@ -100,8 +100,8 @@ jobs:
         if: matrix.platform == 'ubuntu-16.04'
         shell: bash
         env:
-          CC: gcc-9
-          CXX: gcc-9
+          CC: gcc-7
+          CXX: gcc-7
           BOOST_ROOT: "/usr/local/share/boost/1.72.0"
           CXXFLAGS: -fno-sized-deallocation
         run: |