diff --git a/.github/build-cpp-filecoin.src.yml b/.github/build-cpp-filecoin.src.yml
index cfe27d6e5..0f70467ee 100644
--- a/.github/build-cpp-filecoin.src.yml
+++ b/.github/build-cpp-filecoin.src.yml
@@ -13,7 +13,7 @@ jobs:
   ## You should `pre-commit install` or use `pre-commit-hook.sh`,
   ## anyway please read .github/README.md
   check_workflow_yaml_coressponds_to_src_yaml:
-    runs-on: ubuntu-20.04 #ubuntu-latest
+    runs-on: ubuntu-latest
     #container: ubuntu:latest  ## This is required as barrier between AWS-hosted runners and GitHub-hosted runners - they have different set of software, so run in container
     name: Check if github workflows were properly made from sources
     steps:
@@ -48,7 +48,7 @@ jobs:
   ## Note: image is push only when DockerHub login-token pair available - not to PRs from forks.
   Docker-fuhon-builder:
     needs: check_workflow_yaml_coressponds_to_src_yaml
-    runs-on: ubuntu-20.04 #ubuntu-latest #[ self-hosted, Linux ]
+    runs-on: ubuntu-latest #[ self-hosted, Linux ]
     env: &env_dockerhub
       DOCKERHUB_ORG: soramitsu ## Cannot use ${{ secrets.DOCKERHUB_ORG }}
       DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -128,7 +128,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
       - &step_docker_cache
         name: Cache Docker layers
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{env.dockertag}}
@@ -190,4 +190,4 @@ jobs:
       ## if dockertag is already pushed then use it. But let it be empty when tag does not exist remotely.
       dockertag: ${{steps.dockertag.outputs.dockertag}}
       container: ${{steps.dockertag_already.outputs.container}}
-      pushed: ${{ steps.docker_login.outcome == 'success' && steps.build_and_push.outcome == 'success' }}
\ No newline at end of file
+      pushed: ${{ steps.docker_login.outcome == 'success' && steps.build_and_push.outcome == 'success' }}
diff --git a/.github/workflows/asan.yml b/.github/workflows/asan.yml
index 68e4d90a5..9992fbbe5 100644
--- a/.github/workflows/asan.yml
+++ b/.github/workflows/asan.yml
@@ -10,14 +10,14 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
         with:
           submodules: 'recursive'
         name: checkout repo
       - name: cache
-        uses: actions/cache@v1.2.0
+        uses: actions/cache@v4
         env:
           cache-name: cache-filecoin-ffi-proofs
           version: v28
diff --git a/.github/workflows/build-cpp-filecoin.yml b/.github/workflows/build-cpp-filecoin.yml
index e76ba4d9e..ce56637de 100644
--- a/.github/workflows/build-cpp-filecoin.yml
+++ b/.github/workflows/build-cpp-filecoin.yml
@@ -14,7 +14,7 @@ jobs:
   ## You should `pre-commit install` or use `pre-commit-hook.sh`,
   ## anyway please read .github/README.md
   check_workflow_yaml_coressponds_to_src_yaml:
-    runs-on: ubuntu-20.04 #ubuntu-latest
+    runs-on: ubuntu-latest
     #container: ubuntu:latest  ## This is required as barrier between AWS-hosted runners and GitHub-hosted runners - they have different set of software, so run in container
     name: Check if github workflows were properly made from sources
     steps:
@@ -43,7 +43,7 @@ jobs:
   ## Note: image is push only when DockerHub login-token pair available - not to PRs from forks.
   Docker-fuhon-builder:
     needs: check_workflow_yaml_coressponds_to_src_yaml
-    runs-on: ubuntu-20.04 #ubuntu-latest #[ self-hosted, Linux ]
+    runs-on: ubuntu-latest #[ self-hosted, Linux ]
     env:
       DOCKERHUB_ORG: soramitsu ## Cannot use ${{ secrets.DOCKERHUB_ORG }}
       DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -127,7 +127,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
       - name: Cache Docker layers
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{env.dockertag}}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1177ac8d8..ccfd97e5a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,14 +15,12 @@ jobs:
       fail-fast: false
       matrix:
         # 3 jobs in total
-        os: [ ubuntu-20.04, macOS-latest ]
-        compiler: [ {
-          "cc": "gcc",
-          "cxx": "g++"
-        }, {
-          "cc": "clang",
-          "cxx": "clang++"
-        } ]
+        os: [ ubuntu-latest, macOS-latest ]
+        compiler:
+          - cc: gcc
+            cxx: g++
+          - cc: clang
+            cxx: clang++
         exclude:
           - os: macOS-latest
             compiler:
@@ -42,7 +40,7 @@ jobs:
           submodules: 'recursive'
         name: checkout repo
       - name: cache
-        uses: actions/cache@v1.2.0
+        uses: actions/cache@v4
         env:
           cache-name: cache-filecoin-ffi-proofs
           version: v28
@@ -59,12 +57,12 @@ jobs:
             sudo apt-get update
             sudo apt-get install -y ninja-build python-setuptools pkg-config ocl-icd-* opencl-headers libhwloc-dev libhidapi-dev
           fi
-          
+
           pip3 -V || sudo python3 -m pip install --upgrade pip
           sudo pip3 install scikit-build
           sudo pip3 install requests gitpython gcovr pyyaml
           sudo curl https://sh.rustup.rs -sSf | sh -s -- -y
-          
+
           # Workaround to provide additional free space for testing.
           #   https://github.com/actions/virtual-environments/issues/2875
           sudo rm -rf /usr/share/dotnet
diff --git a/.github/workflows/lsan.yml b/.github/workflows/lsan.yml
index 33eb7f3b9..f03f041ec 100644
--- a/.github/workflows/lsan.yml
+++ b/.github/workflows/lsan.yml
@@ -10,14 +10,14 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
       with:
         submodules: 'recursive'
       name: checkout repo
     - name: cache
-      uses: actions/cache@v1.2.0
+      uses: actions/cache@v4
       env:
         cache-name: cache-filecoin-ffi-proofs
         version: v28
diff --git a/.github/workflows/tsan.yml b/.github/workflows/tsan.yml
index 84858ccaa..318e213f6 100644
--- a/.github/workflows/tsan.yml
+++ b/.github/workflows/tsan.yml
@@ -17,7 +17,7 @@ jobs:
           submodules: 'recursive'
         name: checkout repo
       - name: cache
-        uses: actions/cache@v1.2.0
+        uses: actions/cache@v4
         env:
           cache-name: cache-filecoin-ffi-proofs
           version: v28
@@ -45,4 +45,3 @@ jobs:
           CTEST_OUTPUT_ON_FAILURE: 1
           TSAN_OPTIONS: "suppressions=${{ github.workspace }}/.github/workflows/tsan-ignorelist.txt"
         run: cmake --build build --target test
-
diff --git a/.github/workflows/ubsan.yml b/.github/workflows/ubsan.yml
index 24f0dbbb2..9b1611b00 100644
--- a/.github/workflows/ubsan.yml
+++ b/.github/workflows/ubsan.yml
@@ -10,14 +10,14 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
       with:
         submodules: 'recursive'
       name: checkout repo
     - name: cache
-      uses: actions/cache@v1.2.0
+      uses: actions/cache@v4
       env:
         cache-name: cache-filecoin-ffi-proofs
         version: v28