diff --git a/.github/workflows/build-test-cplusplus.yml b/.github/workflows/build-test-cplusplus.yml
index 70c9eab6e..6794730fc 100644
--- a/.github/workflows/build-test-cplusplus.yml
+++ b/.github/workflows/build-test-cplusplus.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: cmake, RunTests, and valgrind on ubuntu-20.04
         run: |
@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: cmake, RunTests with address- and undefined sanitizer on Ubuntu
         run: |
@@ -51,7 +51,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: cmake, RunTests with thread sanitizer on Ubuntu
         run: |
@@ -66,7 +66,7 @@ jobs:
     runs-on: windows-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: cmake, RunTests with Windows
       run: |
diff --git a/.github/workflows/doc-html-pdf.yml b/.github/workflows/doc-html-pdf.yml
index 1f6b63168..1313839aa 100644
--- a/.github/workflows/doc-html-pdf.yml
+++ b/.github/workflows/doc-html-pdf.yml
@@ -17,9 +17,9 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
-    - uses: actions/setup-python@v2
+    - uses: actions/setup-python@v4
       name: Install Python
       with:
         python-version: '3.8'
@@ -35,14 +35,14 @@ jobs:
 #         python -m markdown -x mdx_math --verbose -f proof_of_space.html proof_of_space.md
 
     - name: html to pdf
-      uses: fifsky/html-to-pdf-action@master
+      uses: fifsky/html-to-pdf-action@v0.1
       with:
         htmlFile: ./documents/proof_of_space.html
         outputFile: ./documents/proof_of_space.pdf
         pdfOptions: '{"margin": {"top": "1cm", "left": "1cm", "right": "1cm", "bottom": "1cm"}}'
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v3
       with:
         name: Proof-of-Space-Document
         path: ./documents/proof_of_space.pdf
diff --git a/.github/workflows/plot-k27-no-bitfield.yaml b/.github/workflows/plot-k27-no-bitfield.yaml
index 6d9c28a11..133b97c8b 100644
--- a/.github/workflows/plot-k27-no-bitfield.yaml
+++ b/.github/workflows/plot-k27-no-bitfield.yaml
@@ -17,9 +17,9 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
-    - uses: actions/setup-python@v2
+    - uses: actions/setup-python@v4
       name: Install Python
       with:
         python-version: '3.8'
diff --git a/.github/workflows/plot-k27.yaml b/.github/workflows/plot-k27.yaml
index 3d050aaa0..5b81906a8 100644
--- a/.github/workflows/plot-k27.yaml
+++ b/.github/workflows/plot-k27.yaml
@@ -17,9 +17,9 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
-    - uses: actions/setup-python@v2
+    - uses: actions/setup-python@v4
       name: Install Python
       with:
         python-version: '3.8'