diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index d7eb6dd14..c84a36540 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -7,28 +7,29 @@ permissions:
 
 jobs:
 
-  #xcode_11: 
-  #  strategy:
-  #    fail-fast: false
-  #    matrix:
-  #      xcode: ['11','12','13']
-  #  runs-on: macos-11
-  #
-  #  steps:
-  #    - uses: actions/checkout@v3
-  #      with:
-  #        submodules: recursive
-  #    - uses: maxim-lobanov/setup-xcode@v1
-  #      with:
-  #        xcode-version: ${{ matrix.xcode }}
-  #    - name: cmake
-  #      run: cmake -S . -B build -DJSONCONS_SANITIZE=ON -DCMAKE_BUILD_TYPE=Debug -DJSONCONS_BUILD_TESTS=On 
-  #    - name: build
-  #      working-directory: build/
-  #      run: cmake --build . 
-  #    - name: test
-  #      working-directory: build/
-  #      run: ctest --output-on-failure
+  xcode_11:
+    strategy:
+      fail-fast: false
+      matrix:
+        xcode: ['11','12','13']
+    runs-on: macos-11
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: ${{ matrix.xcode }}
+      - name: cmake
+        run: cmake -S . -B build -DJSONCONS_SANITIZE=ON -DCMAKE_BUILD_TYPE=Debug -DJSONCONS_BUILD_TESTS=On 
+      - name: build
+        working-directory: build/
+        run: cmake --build . 
+      - name: test
+        working-directory: build/
+        run: ctest --output-on-failure
+
 
   xcode_12:
     strategy:
@@ -38,7 +39,7 @@ jobs:
     runs-on: macos-12
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: recursive
       - uses: maxim-lobanov/setup-xcode@v1
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 139bc127b..56358218e 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -21,7 +21,7 @@ jobs:
       CXX: ${{ matrix.compiler }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: cmake
       run: cmake -S . -B build -DCMAKE_CXX_STANDARD=20 -DCMAKE_CXX_STANDARD_REQUIRED=ON -DJSONCONS_BUILD_TESTS=On
 
@@ -169,7 +169,7 @@ jobs:
         compiler: ['8','9','10','11','12','latest']
     container: gcc:${{ matrix.compiler }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Get latest CMake and ninja
         uses: lukka/get-cmake@v3.30.0
       - name: cmake
@@ -188,7 +188,7 @@ jobs:
         compiler: ['12','latest']
     container: gcc:${{ matrix.compiler }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Get latest CMake and ninja
         uses: lukka/get-cmake@v3.30.0
       - name: cmake
@@ -209,7 +209,7 @@ jobs:
     steps:
       - name: Install unzip and git
         run: apt-get update ; apt-get install -y unzip git
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Get latest CMake and ninja
         uses: lukka/get-cmake@v3.30.0
       - name: cmake
@@ -230,7 +230,7 @@ jobs:
     steps:
       - name: Install unzip and git
         run: apt-get update ; apt-get install -y unzip git
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Get latest CMake and ninja
         uses: lukka/get-cmake@v3.30.0
       - name: cmake