diff --git a/.github/workflows/cpp.yml b/.github/workflows/cpp.yml
index b1a05a87..0f71d1da 100644
--- a/.github/workflows/cpp.yml
+++ b/.github/workflows/cpp.yml
@@ -33,12 +33,12 @@ jobs:
     - name: install clang
       run: |
         sudo apt-key adv --fetch-keys https://apt.llvm.org/llvm-snapshot.gpg.key
-        sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-16 main"
-        sudo apt-get install clang-16
+        sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-17 main"
+        sudo apt-get install clang-17
     - name: compile
       run: |
         cd cpp
-        find . -name '*.cpp' -print0 | xargs -n1 -0 clang++-16 -Wall -Wextra -std=c++2b
+        find . -name '*.cpp' -print0 | xargs -n1 -0 clang++-17 -Wall -Wextra -std=c++2b
 
   build-macos-clang:
     runs-on: macos-latest