diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index d4528e8b9e9..f994edecc5d 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -4,7 +4,7 @@ jobs:
   cmake-linux:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         sudo apt update
@@ -24,7 +24,7 @@ jobs:
   cmake-linux-with-options:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         sudo apt update
@@ -44,7 +44,7 @@ jobs:
   cmake-win:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         $Url = "https://boostorg.jfrog.io/artifactory/main/release/1.75.0/binaries/boost_1_75_0-msvc-14.2-64.exe"
@@ -65,7 +65,7 @@ jobs:
   cmake-win-with-options:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         $Url = "https://boostorg.jfrog.io/artifactory/main/release/1.75.0/binaries/boost_1_75_0-msvc-14.2-64.exe"
@@ -86,7 +86,7 @@ jobs:
   cmake-macos:
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         brew install boost
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 5520978fe50..ccb076751d6 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3.1.0
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
diff --git a/.github/workflows/copyrights.yml b/.github/workflows/copyrights.yml
index 472f495cb71..9ff86799390 100644
--- a/.github/workflows/copyrights.yml
+++ b/.github/workflows/copyrights.yml
@@ -7,7 +7,7 @@ jobs:
   copyrights:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Check
       run: |
         ./tools/check_copyrights.sh
diff --git a/.github/workflows/coveralls.yml b/.github/workflows/coveralls.yml
index 6af355b98a3..e57e457ea46 100644
--- a/.github/workflows/coveralls.yml
+++ b/.github/workflows/coveralls.yml
@@ -4,7 +4,7 @@ jobs:
   coverage:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         sudo apt update
diff --git a/.github/workflows/doxygen.yml b/.github/workflows/doxygen.yml
index bf9700921c9..fe5975af5d6 100644
--- a/.github/workflows/doxygen.yml
+++ b/.github/workflows/doxygen.yml
@@ -4,7 +4,7 @@ jobs:
   docs:
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         rm -f /usr/local/bin/2to3
diff --git a/.github/workflows/filelists.yml b/.github/workflows/filelists.yml
index e6c855a2988..d19eaf85412 100644
--- a/.github/workflows/filelists.yml
+++ b/.github/workflows/filelists.yml
@@ -4,7 +4,7 @@ jobs:
   filelists:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         sudo apt update
diff --git a/.github/workflows/headers.yml b/.github/workflows/headers.yml
index 0876ddd88d5..c14191dd156 100644
--- a/.github/workflows/headers.yml
+++ b/.github/workflows/headers.yml
@@ -4,7 +4,7 @@ jobs:
   headers:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         sudo apt update
diff --git a/.github/workflows/link-check.yml b/.github/workflows/link-check.yml
index cbd153f227b..9e1bf9958a3 100644
--- a/.github/workflows/link-check.yml
+++ b/.github/workflows/link-check.yml
@@ -8,5 +8,5 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - uses: gaurav-nelson/github-action-markdown-link-check@v1
diff --git a/.github/workflows/linux-full-tests.yml b/.github/workflows/linux-full-tests.yml
index 8d298144201..26e27d2e0fe 100644
--- a/.github/workflows/linux-full-tests.yml
+++ b/.github/workflows/linux-full-tests.yml
@@ -169,7 +169,7 @@ jobs:
             configureflags: --enable-openmp
     container: ghcr.io/lballabio/quantlib-devenv:${{ matrix.tag }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Cache
       uses: actions/cache@v2
       with:
diff --git a/.github/workflows/linux-nondefault.yml b/.github/workflows/linux-nondefault.yml
index fef1357c39e..0868a649fca 100644
--- a/.github/workflows/linux-nondefault.yml
+++ b/.github/workflows/linux-nondefault.yml
@@ -122,7 +122,7 @@ jobs:
             configureflags: --enable-openmp
     container: ghcr.io/lballabio/quantlib-devenv:${{ matrix.tag }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Cache
       uses: actions/cache@v2
       with:
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 8126d2f4eec..54ea1a541a1 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -187,7 +187,7 @@ jobs:
             moreflags: -lrt
     container: ghcr.io/lballabio/quantlib-devenv:${{ matrix.tag }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Cache
       uses: actions/cache@v2
       with:
diff --git a/.github/workflows/macos-nondefault.yml b/.github/workflows/macos-nondefault.yml
index 7987cc734ff..fea39392339 100644
--- a/.github/workflows/macos-nondefault.yml
+++ b/.github/workflows/macos-nondefault.yml
@@ -20,7 +20,7 @@ jobs:
             cxxflags: "-std=c++17"
             configureflags: --enable-std-classes
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         brew install automake boost ccache
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 11a01ef9cc8..c548779d205 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -12,7 +12,7 @@ jobs:
           - os: [macos-11]
             shortname: default-11
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         brew install automake boost ccache
diff --git a/.github/workflows/misspell.yml b/.github/workflows/misspell.yml
index 5cbf54c7099..b342db5c0d0 100644
--- a/.github/workflows/misspell.yml
+++ b/.github/workflows/misspell.yml
@@ -7,7 +7,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - uses: sobolevn/misspell-fixer-action@master
     - uses: peter-evans/create-pull-request@v3
       with:
diff --git a/.github/workflows/test-times.yml b/.github/workflows/test-times.yml
index ed648f02d74..164234bf787 100644
--- a/.github/workflows/test-times.yml
+++ b/.github/workflows/test-times.yml
@@ -4,7 +4,7 @@ jobs:
   check-test-times:
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Cache
       uses: actions/cache@v2
       with:
diff --git a/.github/workflows/tidy.yml b/.github/workflows/tidy.yml
index 1bb59f5040b..3d20c42e731 100644
--- a/.github/workflows/tidy.yml
+++ b/.github/workflows/tidy.yml
@@ -7,7 +7,7 @@ jobs:
   check:
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Setup
       run: |
         sudo apt-get update