diff --git a/.github/workflows/graalvm.yml b/.github/workflows/graalvm.yml
index 3482c4ef..8c293778 100644
--- a/.github/workflows/graalvm.yml
+++ b/.github/workflows/graalvm.yml
@@ -14,7 +14,7 @@ jobs:
     name: ${{ matrix.os }} JDK ${{ matrix.java-version }}.${{ matrix.distribution }}
     steps:
       - name: Git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up GraalVM
         uses: graalvm/setup-graalvm@v1
         with:
@@ -22,7 +22,7 @@ jobs:
           distribution: ${{ matrix.distribution }}
           github-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Cache Gradle packages
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
@@ -30,7 +30,7 @@ jobs:
       - name: Build with Gradle
         run: ./gradlew nativeCompile --scan --info --stacktrace
       - name: Upload jsonrpc tool as artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: jsonrpc-tool-${{ matrix.os }}
           path: consensusj-jsonrpc-cli/build/jsonrpc
diff --git a/.github/workflows/gradle-wrapper-validation.yml b/.github/workflows/gradle-wrapper-validation.yml
index 889aa3c3..18dc3344 100644
--- a/.github/workflows/gradle-wrapper-validation.yml
+++ b/.github/workflows/gradle-wrapper-validation.yml
@@ -6,5 +6,5 @@ jobs:
     name: "Validate Gradle Wrapper"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: gradle/wrapper-validation-action@v1
diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 8e96edf4..3964347d 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -14,14 +14,14 @@ jobs:
     name: ${{ matrix.os }} JDK ${{ matrix.java }}
     steps:
     - name: Git checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Set up JDK
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v4
       with:
         distribution: ${{ matrix.distribution }}
         java-version: ${{ matrix.java }}
     - name: Cache Gradle packages
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/.gradle/caches
         key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
@@ -37,12 +37,12 @@ jobs:
       working-directory: ./build
       if: runner.os == 'macOS'
     - name: Upload SHA256SUMS
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: SHA256SUMS-${{ matrix.os }}-${{ matrix.java }}
         path: build/SHA256SUMS
     - name: Upload artifacts
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: artifacts-${{ matrix.os }}-${{ matrix.java }}
         path: build/artifacts
diff --git a/.github/workflows/regtest.yml b/.github/workflows/regtest.yml
index aed74c53..1cbc0183 100644
--- a/.github/workflows/regtest.yml
+++ b/.github/workflows/regtest.yml
@@ -13,16 +13,16 @@ jobs:
       fail-fast: false
     name: ${{ matrix.os }} JDK ${{ matrix.java }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Download Omni Core (Bitcoin Core superset)
       run: ./test-download-omnicore-ubuntu.sh
     - name: Set up JDK
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v4
       with:
         distribution: ${{ matrix.distribution }}
         java-version: ${{ matrix.java }}
     - name: Cache Gradle packages
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/.gradle/caches
         key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
@@ -30,7 +30,7 @@ jobs:
     - name: Run RegTests
       run: ./test-run-regtest.sh
     - name: Upload RegTest results as artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       if: failure()
       with:
         name: regtest-consensusj-jdk${{ matrix.java }}-${{ matrix.os }}-reports