diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 02e8c75..7d6d857 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,6 +22,8 @@ jobs:
             cpu: i386
           - os: macos
             cpu: amd64
+          - os: macos
+            cpu: arm64
           - os: windows
             cpu: amd64
           #- os: windows
@@ -34,8 +36,15 @@ jobs:
             shell: bash
           - target:
               os: macos
+              cpu: amd64
             builder: macos-12
             shell: bash
+          - target:
+              os: macos
+              cpu: arm64
+            # On macos-14, we get an M1 cpu
+            builder: macos-14
+            shell: bash
           - target:
               os: windows
             builder: windows-2019
@@ -122,6 +131,8 @@ jobs:
         run: |
           if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
             PLATFORM=x64
+          elif [[ '${{ matrix.target.cpu }}' == 'arm64' ]]; then
+            PLATFORM=arm64
           else
             PLATFORM=x86
           fi
@@ -148,7 +159,7 @@ jobs:
       - name: Build Nim and Nimble
         run: |
           curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
-          env MAKE="${MAKE_CMD} -j${ncpu}" ARCH_OVERRIDE=${PLATFORM} NIM_COMMIT=${{ matrix.branch }} \
+          env MAKE="${MAKE_CMD} -j${ncpu}" V=1 ARCH_OVERRIDE=${PLATFORM} NIM_COMMIT=${{ matrix.branch }} \
             QUICK_AND_DIRTY_COMPILER=1 QUICK_AND_DIRTY_NIMBLE=1 CC=gcc \
             bash build_nim.sh nim csources dist/nimble NimBinaries
           echo '${{ github.workspace }}/nim/bin' >> $GITHUB_PATH
diff --git a/ssz_serialization/digest.nim b/ssz_serialization/digest.nim
index b706771..3243261 100644
--- a/ssz_serialization/digest.nim
+++ b/ssz_serialization/digest.nim
@@ -20,7 +20,7 @@ import nimcrypto/[hash, sha2], stew/ptrops, ./types
 
 const PREFER_BLST_SHA256* {.booldefine.} = true
 # TODO https://github.com/prysmaticlabs/hashtree/issues/28
-const PREFER_HASHTREE_SHA256* {.booldefine.} = not defined(arm64)
+const PREFER_HASHTREE_SHA256* {.booldefine.} = true
 
 when PREFER_BLST_SHA256:
   import blscurve
@@ -38,10 +38,11 @@ else:
   {.hint: "nimcrypto SHA256 backend enabled".}
   type DigestCtx* = sha2.sha256
 
-when PREFER_HASHTREE_SHA256 and
-    (defined(arm64) or defined(amd64)) and
-    ((defined(gcc) and (defined(linux) or defined(windows))) or
-      (defined(clang) and defined(linux))):
+when PREFER_HASHTREE_SHA256 and (defined(arm64) or defined(amd64)) and (
+  ((defined(linux) or defined(windows)) and defined(gcc)) or
+  (defined(linux) and defined(clang)) or
+  (defined(macosx) and defined(clang) and defined(arm64))
+):
   {.hint: "Hashtree SHA256 backend enabled".}
   const USE_HASHTREE_SHA256 = true
 
diff --git a/vendor/hashtree b/vendor/hashtree
index 616c243..1efb91a 160000
--- a/vendor/hashtree
+++ b/vendor/hashtree
@@ -1 +1 @@
-Subproject commit 616c243905b38285373771a30e9ba13bf96a3aa8
+Subproject commit 1efb91ade509aeb1ee1dbac57dc9b1985afcdf17