diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a01a371..cb2a5ba 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -52,6 +52,7 @@ jobs:
           - toolset: gcc-11
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-18.04
+            install: g++-11
           - toolset: clang
             compiler: clang++-3.5
             cxxstd: "03,11"