diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 0576f56..2b4f28b 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -14,7 +14,7 @@ jobs:
 
   #  steps:
   #    - name: Checkout
-  #      uses: actions/checkout@v1
+  #      uses: actions/checkout@v5
 
   #    - name: Build
   #      run: |
@@ -40,7 +40,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v5
 
       - name: Build
         run: |
@@ -60,7 +60,7 @@ jobs:
     # https://help.github.com/en/actions/reference/software-installed-on-github-hosted-runners
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v5
       - name: Configure
         run: |
           mkdir build
@@ -78,7 +78,7 @@ jobs:
     name: Buld with gcc
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v5
     - name: build
       run: |
         g++ -std=c++11 -o loader_example loader_example.cc
@@ -118,7 +118,7 @@ jobs:
     name: Buld with gcc + rapidjson
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v5
     - name: build
       run: |
         git clone https://github.com/Tencent/rapidjson
@@ -151,7 +151,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v5
       - name: Build
         run: |
             sudo apt-get update
@@ -169,7 +169,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v5
       - name: Build
         run: |
             clang++ -std=c++11 -g -O0 -o loader_example loader_example.cc
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5bdc4d9..ac27497 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     name: Linux x64 (GCC)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Configure
         run: cmake -B build -DTINYGLTF_BUILD_LOADER_EXAMPLE=ON
@@ -43,7 +43,7 @@ jobs:
     name: Linux x64 (Clang 21)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install Clang 21
         run: |
@@ -71,7 +71,7 @@ jobs:
     name: Linux ARM64 (GCC)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Configure
         run: cmake -B build -DTINYGLTF_BUILD_LOADER_EXAMPLE=ON
@@ -91,7 +91,7 @@ jobs:
     name: macOS ARM64 Apple Silicon (Clang)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Configure
         run: cmake -B build -DTINYGLTF_BUILD_LOADER_EXAMPLE=ON
@@ -111,7 +111,7 @@ jobs:
     name: Windows x64 (MSVC)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Configure
         run: |
@@ -135,7 +135,7 @@ jobs:
     name: Windows x86 (MSVC)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Configure
         run: |
@@ -155,7 +155,7 @@ jobs:
     name: Windows ARM64 (MSVC) - Cross-compile
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Configure
         run: |
@@ -175,7 +175,7 @@ jobs:
         shell: msys2 {0}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup MSYS2
         uses: msys2/setup-msys2@v2
@@ -205,7 +205,7 @@ jobs:
     name: Linux→Windows (MinGW Cross) - Build Only
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install MinGW
         run: |
@@ -222,7 +222,7 @@ jobs:
     name: Linux x64 (GCC) - No Exceptions
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build loader_example
         run: |
@@ -244,7 +244,7 @@ jobs:
     name: Linux x64 (GCC) - Header-Only Mode
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build with CMake Header-Only
         run: |
@@ -265,7 +265,7 @@ jobs:
     name: Linux x64 (GCC) - RapidJSON Backend
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Clone RapidJSON
         run: |
@@ -291,7 +291,7 @@ jobs:
     name: Linux x64 (Clang) - AddressSanitizer
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build loader_example with ASan
         run: |
@@ -313,7 +313,7 @@ jobs:
     name: Linux x64 (Clang) - UndefinedBehaviorSanitizer
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build loader_example with UBSan
         run: |
@@ -335,7 +335,7 @@ jobs:
     name: v3 C tests (Linux x64, GCC)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build tester_v3_c
         run: |
@@ -365,7 +365,7 @@ jobs:
     name: v3 C tests (Linux x64, Clang)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install clang
         run: |
@@ -408,7 +408,7 @@ jobs:
     name: v3 C tests (Linux x64, Clang 21)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install clang 21
         run: |
@@ -452,7 +452,7 @@ jobs:
     name: v3 C tests (Windows x64, MSVC /W4)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build and run tester_v3_c
         shell: cmd
@@ -476,7 +476,7 @@ jobs:
     name: v3 C tests (Clang ASan + UBSan)
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build tester_v3_c with ASan + UBSan
         run: |
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index dad8bab..00b31a9 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -38,11 +38,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v5
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@v3
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -56,7 +56,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
+      uses: github/codeql-action/autobuild@v3
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
@@ -69,4 +69,4 @@ jobs:
     #   ./location_of_script_within_repo/buildscript.sh
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@v3
diff --git a/.github/workflows/mingw-w64-msys2.yml b/.github/workflows/mingw-w64-msys2.yml
index 65539d5..5645d76 100644
--- a/.github/workflows/mingw-w64-msys2.yml
+++ b/.github/workflows/mingw-w64-msys2.yml
@@ -20,7 +20,7 @@ jobs:
       run:
         shell: msys2 {0}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
 
       - name: Install core & build dependencies
         uses: msys2/setup-msys2@v2