diff --git a/DEPS b/DEPS
index b429735570..022183984d 100644
--- a/DEPS
+++ b/DEPS
@@ -25,7 +25,7 @@ deps = {
   "third_party/externals/egl-registry"    : "https://skia.googlesource.com/external/github.com/KhronosGroup/EGL-Registry@a0bca08de07c7d7651047bedc0b653cfaaa4f2ae",
   "third_party/externals/expat"           : "https://chromium.googlesource.com/external/github.com/libexpat/libexpat.git@a28238bdeebc087071777001245df1876a11f5ee",
   "third_party/externals/freetype"        : "https://chromium.googlesource.com/chromium/src/third_party/freetype2.git@61903609674f2a4ad18abbbcb1d40f5c8beeeaf4",
-  "third_party/externals/harfbuzz"        : "https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz.git@368e9578873798e2d17ed78a0474dec7d4e9d6c0",
+  "third_party/externals/harfbuzz"        : "https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz.git@6f1909439862cc37246aba55a85c0a072b945dff",
   "third_party/externals/icu"             : "https://chromium.googlesource.com/chromium/deps/icu.git@a0718d4f121727e30b8d52c7a189ebf5ab52421f",
   "third_party/externals/imgui"           : "https://skia.googlesource.com/external/github.com/ocornut/imgui.git@9418dcb69355558f70de260483424412c5ca2fce",
   "third_party/externals/libgifcodec"     : "https://skia.googlesource.com/libgifcodec@fd59fa92a0c86788dcdd84d091e1ce81eda06a77",
diff --git a/third_party/harfbuzz/roll-harfbuzz.sh b/third_party/harfbuzz/roll-harfbuzz.sh
new file mode 100755
index 0000000000..bd7e6151d5
--- /dev/null
+++ b/third_party/harfbuzz/roll-harfbuzz.sh
@@ -0,0 +1,85 @@
+#!/bin/bash
+
+HB_GIT_REPO=https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz.git
+HB_GIT_REF=origin/upstream/main
+HB_GIT_DIR=third_party/externals/harfbuzz
+HB_BUILD_DIR=$(dirname -- "$0")
+
+previousrev() {
+  STEP="original revision" &&
+  HB_PREVIOUS_REV=$(git grep "${HB_GIT_REPO}" HEAD~1 -- DEPS | sed 's!.*'${HB_GIT_REPO}'@\([[:xdigit:]]\{40\}\).*!\1!')
+}
+
+nextrev() {
+  STEP="next revision" &&
+  git -C ${HB_GIT_DIR} fetch &&
+  HB_NEXT_REV=$(git -C ${HB_GIT_DIR} rev-parse ${HB_GIT_REF})
+}
+
+rolldeps() {
+  STEP="roll-deps" &&
+  sed -i'' -e "s!${HB_GIT_REPO}@${HB_PREVIOUS_REV}!${HB_GIT_REPO}@${HB_NEXT_REV}!" DEPS &&
+  tools/git-sync-deps &&
+  git add DEPS
+}
+
+check_all_files_are_categorized() {
+  #for each file name in ${HB_GIT_DIR}/src/hb-*.{cc,h,hh}
+  #  if the file name is not present in BUILD.gn
+  #    should be added to BUILD.gn (in 'unused_sources' if unwanted)
+
+  #for each file name \"src/.*\" in BUILD.gn
+  #  if the file name does not exist
+  #    should be removed from BUILD.gn
+
+  STEP="Updating BUILD.gn" &&
+  HB_BUILD_DIR_REL=$(realpath --relative-to=${HB_GIT_DIR} ${HB_BUILD_DIR})
+  ( # Create subshell for IFS, CDPATH, and cd.
+    # This implementation doesn't handle '"' or '\n' in file names.
+    IFS=$'\n' &&
+    CDPATH= &&
+    cd -- "${HB_GIT_DIR}" &&
+
+    HB_SOURCE_MISSING=false &&
+    find src/ -type f \( -name "hb-*.cc" -o -name "hb-*.h" -o -name "hb-*.hh" \) | while read HB_SOURCE
+    do
+      if ! grep -qF "$HB_SOURCE" ${HB_BUILD_DIR_REL}/BUILD.gn; then
+        if ! ${HB_SOURCE_MISSING}; then
+          echo "Is in src/hb-*.{cc,h,hh} but not in BUILD.gn:"
+          HB_SOURCE_MISSING=true
+        fi
+        echo "      \"\$_${HB_SOURCE}\","
+      fi
+    done &&
+
+    GN_SOURCE_MISSING=false &&
+    grep -oE "\"\\\$_src/[^\"]+\"" ${HB_BUILD_DIR_REL}/BUILD.gn | sed 's/^...\(.*\).$/\1/' | while read GN_SOURCE
+    do
+      if [ ! -f "${GN_SOURCE}" ]; then
+        if ! ${GN_SOURCE_MISSING}; then
+          echo "Is referenced in BUILD.gn but does not exist:" &&
+          GN_SOURCE_MISSING=true
+        fi
+        echo "\"${GN_SOURCE}\""
+      fi
+    done
+  )
+}
+
+commit() {
+  STEP="commit" &&
+  HB_PREVIOUS_REV_SHORT=$(expr substr "${HB_PREVIOUS_REV}" 1 8) &&
+  HB_NEXT_REV_SHORT=$(expr substr "${HB_NEXT_REV}" 1 8) &&
+  HB_COMMIT_COUNT=$(git -C ${HB_GIT_DIR} rev-list --count ${HB_PREVIOUS_REV}..${HB_NEXT_REV}) &&
+  git commit -m"Roll HarfBuzz from ${HB_PREVIOUS_REV_SHORT} to ${HB_NEXT_REV_SHORT} (${HB_COMMIT_COUNT} commits)
+
+${HB_GIT_REPO}/+log/${HB_PREVIOUS_REV}..${HB_NEXT_REV}
+"
+}
+
+previousrev &&
+nextrev &&
+rolldeps "$@" &&
+check_all_files_are_categorized &&
+commit &&
+true || { echo "Failed step ${STEP}"; exit 1; }