diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ada9f2d..62561bc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,6 +45,7 @@ jobs:
           - toolset: gcc-11
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
+            install: g++-11
           - toolset: clang
             compiler: clang++-3.9
             cxxstd: "03,11,14"