diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f18640f..125e1c1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,27 +18,39 @@ jobs:
         target:
           - os: linux
             cpu: amd64
+          - os: linux-gcc-14 # This is to use ubuntu 24 and install gcc 14. Should be removed when ubuntu-latest is 26.04
+            cpu: amd64
           - os: linux
             cpu: i386
           - os: macos
             cpu: amd64
+          - os: macos
+            cpu: arm64
           - os: windows
             cpu: amd64
-          #- os: windows
-            #cpu: i386
-        branch: [version-1-6, version-2-0, devel]
+        branch: [version-2-0, version-2-2, devel]
         include:
           - target:
               os: linux
-            builder: ubuntu-20.04
+            builder: ubuntu-latest
+            shell: bash
+          - target:
+              os: linux-gcc-14 # This is to use ubuntu 24 and install gcc 14. Should be removed when ubuntu-latest is 26.04
+            builder: ubuntu-24.04
             shell: bash
           - target:
               os: macos
-            builder: macos-12
+              cpu: amd64
+            builder: macos-13
+            shell: bash
+          - target:
+              os: macos
+              cpu: arm64
+            builder: macos-latest
             shell: bash
           - target:
               os: windows
-            builder: windows-2019
+            builder: windows-latest
             shell: msys2 {0}
 
     defaults:
@@ -50,7 +62,7 @@ jobs:
     continue-on-error: ${{ matrix.branch == 'devel' }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
 
@@ -98,7 +110,7 @@ jobs:
       - name: Restore Nim DLLs dependencies (Windows) from cache
         if: runner.os == 'Windows'
         id: windows-dlls-cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: external/dlls-${{ matrix.target.cpu }}
           key: 'dlls-${{ matrix.target.cpu }}'
@@ -122,6 +134,8 @@ jobs:
         run: |
           if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
             PLATFORM=x64
+          elif [[ '${{ matrix.target.cpu }}' == 'arm64' ]]; then
+            PLATFORM=arm64
           else
             PLATFORM=x86
           fi
@@ -153,10 +167,20 @@ jobs:
             bash build_nim.sh nim csources dist/nimble NimBinaries
           echo '${{ github.workspace }}/nim/bin' >> $GITHUB_PATH
 
+      - name: Use gcc 14
+        # Should be removed when ubuntu-latest is 26.04
+        if : ${{ matrix.target.os == 'linux-gcc-14' }}
+        run: |
+          # Add GCC-14 to alternatives
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 14
+          # Set GCC-14 as the default
+          sudo update-alternatives --set gcc /usr/bin/gcc-14
+
       - name: Run tests
         run: |
           nim --version
           nimble --version
+          gcc --version
           nimble install -y --depsOnly
           rm -f nimble.lock
           env NIMLANG=c nimble test
diff --git a/secp256k1.nimble b/secp256k1.nimble
index 3237ccb..8fa70de 100644
--- a/secp256k1.nimble
+++ b/secp256k1.nimble
@@ -26,9 +26,9 @@ proc build(args, path: string) =
   exec nimc & " " & lang & " " & cfg & " " & flags & " " & args & " " & path
 
 proc run(args, path: string) =
-  build args & " -r", path
+  build args & " --mm:refc -r", path
   if (NimMajor, NimMinor) > (1, 6):
-    build args & " --mm:refc -r", path
+    build args & " --mm:orc -r", path
 
 task test, "Tests":
   run "--threads:on", "tests/all_tests"