diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 625502c6..57d54dc1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,11 +13,11 @@ jobs:
     name: Single header
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
 
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
 
@@ -39,12 +39,12 @@ jobs:
       - name: Copy file to main folder
         run: cp build/include/CLI11.hpp CLI11.hpp
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: CLI11.hpp
           path: CLI11.hpp
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: CLI11-Source
           path: CLI11-Source
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 322ce51d..6b79b352 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -20,13 +20,13 @@ jobs:
   apidocs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: mattnotmitt/doxygen-action@v1
         with:
           doxyfile-path: ./docs/Doxyfile
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: api-docs
           path: html
@@ -34,9 +34,9 @@ jobs:
   gitbook:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: 16
 
@@ -56,7 +56,7 @@ jobs:
           npx gitbook build . public
           npx gitbook pdf . public/cli11.pdf
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: gitbook
           path: book/public
@@ -72,20 +72,20 @@ jobs:
       && github.ref == 'refs/heads/main'
       && github.repository == 'CLIUtils/CLI11'
     steps:
-      - uses: actions/configure-pages@v3
+      - uses: actions/configure-pages@v4
         id: pages
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: api-docs
           path: _site
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: gitbook
           path: _site/book
 
-      - uses: actions/upload-pages-artifact@v1
+      - uses: actions/upload-pages-artifact@v3
 
-      - uses: actions/deploy-pages@v2
+      - uses: actions/deploy-pages@v4
         id: deployment
diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index cf31a030..413f150f 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -16,7 +16,7 @@ jobs:
     name: quickfuzz1
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -48,7 +48,7 @@ jobs:
 
       - name: artifacts
         if: failure()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: file_failure
           path: ./build/fuzz/cli11_*_fail_artifact.txt
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b5f8acbd..19f99f4e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -19,7 +19,7 @@ jobs:
         std: ["11", "14", "17", "20"]
         precompile: ["ON", "OFF"]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -62,7 +62,7 @@ jobs:
     runs-on: ubuntu-latest
     container: silkeh/clang:14
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Configure
         run: >
@@ -80,7 +80,7 @@ jobs:
     steps:
       - name: Add build tools
         run: apt-get update && apt-get install -y wget git cmake
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Configure
@@ -95,7 +95,7 @@ jobs:
     steps:
       - name: Add build tools
         run: apt-get update && apt-get install -y wget git cmake
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Configure
@@ -107,7 +107,7 @@ jobs:
     name: Boost build
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Add boost
@@ -126,7 +126,7 @@ jobs:
     name: Meson build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Prepare commands
         run: |
@@ -143,7 +143,7 @@ jobs:
     name: install tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Configure
@@ -160,7 +160,7 @@ jobs:
     name: install tests precompiled
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Configure
@@ -177,7 +177,7 @@ jobs:
     name: install tests single file
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Configure
@@ -194,7 +194,7 @@ jobs:
     name: CMake config check (Ubuntu 20.04)
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Check CMake 3.5
         uses: ./.github/actions/quick_cmake
@@ -273,7 +273,7 @@ jobs:
     name: CMake config check (Ubuntu 22.04)
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Check CMake 3.17
         uses: ./.github/actions/quick_cmake