diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 00885ae..4b485b8 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        compiler: [g++-9, g++-10, g++-11, clang++-12, clang++-13, clang++-14]
+        compiler: [g++-10, g++-11, clang++-12, clang++-13, clang++-14]
 
     steps:
     - uses: actions/checkout@v3