diff --git a/.github/workflows/cpp.yml b/.github/workflows/cpp.yml
index 470dac77..fca42508 100644
--- a/.github/workflows/cpp.yml
+++ b/.github/workflows/cpp.yml
@@ -16,11 +16,11 @@ jobs:
       - name: install g++
         run: |
           sudo add-apt-repository ppa:ubuntu-toolchain-r/test
-          sudo apt-get install g++-13
+          sudo apt-get install g++-14
       - name: compile
         run: |
           cd cpp
-          find . -name '*.cpp' -print0 | xargs -n1 -0 g++-13 ${{ matrix.config.compiler-options }}
+          find . -name '*.cpp' -print0 | xargs -n1 -0 g++-14 ${{ matrix.config.compiler-options }}
 
   build-ubuntu-clang:
     runs-on: ubuntu-latest
@@ -29,27 +29,27 @@ 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-17 main"
-        sudo apt-get install clang-17
+        sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-18 main"
+        sudo apt-get install clang-18
     - name: compile
       run: |
         cd cpp
-        find . -name '*.cpp' -print0 | xargs -n1 -0 clang++-17 -Wall -Wextra -std=c++2b
+        find . -name '*.cpp' -print0 | xargs -n1 -0 clang++-18 -Wall -Wextra -std=c++23
 
   build-macos-clang:
     runs-on: macos-latest
     strategy:
       matrix:
         config:
-          - {compiler-options: "-Wall -Wextra -std=c++2b -isystem"}
-          - {compiler-options: "-Wall -Wextra -Wno-sign-compare -std=c++2b -isystem"}
+          - {compiler-options: "-Wall -Wextra -std=c++23 -isystem"}
+          - {compiler-options: "-Wall -Wextra -Wno-sign-compare -std=c++23 -isystem"}
     steps:
       - uses: actions/checkout@v2
       - name: compile
         run: |
           cd cpp
           mkdir bits
-          echo $'#include <vector>\n#include <set>\n#include <map>\n#include <unordered_set>\n#include <unordered_map>\n#include <queue>\n#include <deque>\n#include <stack>\n#include <iostream>\n#include <iomanip>\n#include <complex>\n#include <cassert>\n#include <random>\n#include <chrono>\n#include <functional>\n#include <array>\n#include <bitset>\n#include <numeric>\n' > bits/stdc++.h
+          echo $'#include <algorithm>\n#include <iterator>\n#include <vector>\n#include <set>\n#include <map>\n#include <unordered_set>\n#include <unordered_map>\n#include <queue>\n#include <deque>\n#include <stack>\n#include <iostream>\n#include <iomanip>\n#include <complex>\n#include <cassert>\n#include <random>\n#include <chrono>\n#include <functional>\n#include <array>\n#include <bitset>\n#include <numeric>\n' > bits/stdc++.h
           find . -name '*.cpp' -print0 | xargs -n1 -0 clang++ ${{ matrix.config.compiler-options }} .
 
   build-windows-visual-cpp-17:
@@ -76,4 +76,4 @@ jobs:
           cd cpp
           mkdir bits
           C:\msys64\usr\bin\echo.exe -e '#include \74vector\76\n#include \74set\76\n#include \74map\76\n#include \74unordered_set\76\n#include \74unordered_map\76\n#include \74queue\76\n#include \74deque\76\n#include \74stack\76\n#include \74iostream\76\n#include \74iomanip\76\n#include \74complex\76\n#include \74cassert\76\n#include \74random\76\n#include \74chrono\76\n#include \74functional\76\n#include \74array\76\n#include \74bitset\76\n#include \74numeric\76\n' > bits\stdc++.h
-          C:\msys64\usr\bin\find . -name '*.cpp' -print0 | C:\msys64\usr\bin\xargs -n1 -0 cl //std:c++20 //EHsc //I .
+          C:\msys64\usr\bin\find . -name '*.cpp' -print0 | C:\msys64\usr\bin\xargs -n1 -0 cl //std:c++23 //EHsc //I .