diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 5c2d34d..da40dcb 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
diff --git a/src/argparse.cpp b/src/argparse.cpp
index 33d9db9..6834708 100644
--- a/src/argparse.cpp
+++ b/src/argparse.cpp
@@ -1,9 +1,10 @@
 /* argparse.cpp - Copyright (C) 2024 a dinosaur (zlib, see COPYING.txt) */
 
 #include "argparse.hpp"
-#include <iomanip>
-#include <filesystem>
 #include <optional>
+#include <cstring>
+#include <filesystem>
+#include <iomanip>
 #include <iostream>