diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e557003..6727035 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
       matrix:
         include:
           - toolset: gcc-4.7
-            cxxstd: "0x"
+            cxxstd: "11"
             container: ubuntu:16.04
             os: ubuntu-latest
             install: g++-4.7-multilib
@@ -175,9 +175,6 @@ jobs:
             container: ubuntu:24.04
             os: ubuntu-latest
             install: clang-18
-          - toolset: clang
-            cxxstd: "11,14,17,2a"
-            os: macos-11
           - toolset: clang
             cxxstd: "11,14,17,20,2b"
             os: macos-12
@@ -196,6 +193,10 @@ jobs:
         shell: bash
 
     steps:
+      - name: Enable Node 16
+        run: |
+          echo "ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true" >> $GITHUB_ENV
+
       - uses: actions/checkout@v3
 
       - name: Setup container environment
@@ -272,7 +273,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd
@@ -309,14 +310,14 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
           - os: macos-12
           - os: macos-13
+          - os: macos-14
 
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install packages
         if: matrix.install
@@ -357,14 +358,14 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
           - os: macos-12
           - os: macos-13
+          - os: macos-14
 
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install packages
         if: matrix.install
@@ -415,14 +416,14 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
           - os: macos-12
           - os: macos-13
+          - os: macos-14
 
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install packages
         if: matrix.install
@@ -475,7 +476,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd
@@ -524,7 +525,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd
@@ -591,7 +592,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd