diff --git a/Dockerfile b/Dockerfile
index ae8ca135..e1354bb8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -46,8 +46,9 @@ RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
   --var version=0.1.1 --var app=maven-metadata-release --file {{.app}} \
   --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
-ARG MC_HELPER_VERSION=1.20.3
-ARG MC_HELPER_BASE_URL=https://github.com/itzg/mc-image-helper/releases/download/v${MC_HELPER_VERSION}
+ARG MC_HELPER_VERSION=1.21.0
+ARG MC_HELPER_RELEASE=v${MC_HELPER_VERSION}
+ARG MC_HELPER_BASE_URL=https://github.com/itzg/mc-image-helper/releases/download/${MC_HELPER_RELEASE}
 RUN curl -fsSL ${MC_HELPER_BASE_URL}/mc-image-helper-${MC_HELPER_VERSION}.tgz \
   | tar -C /usr/share -zxf - \
   && ln -s /usr/share/mc-image-helper-${MC_HELPER_VERSION}/bin/mc-image-helper /usr/bin
diff --git a/scripts/start-deployForge b/scripts/start-deployForge
index 4ef67f56..09cf6278 100755
--- a/scripts/start-deployForge
+++ b/scripts/start-deployForge
@@ -6,155 +6,21 @@
 . "${SCRIPTS:-$(dirname "$0")}/start-utils"
 isDebugging && set -x
 
-get_installer() {
-  if [[ -z $FORGE_INSTALLER_URL ]]; then
-    log "Downloading Forge Installer $normForgeVersion"
-
-    forgeFileNames="
-    $shortForgeVersion/forge-$shortForgeVersion-installer.jar
-    $normForgeVersion/forge-$normForgeVersion-installer.jar
-  "
-
-    for fn in $forgeFileNames; do
-      downloadUrl=https://maven.minecraftforge.net/net/minecraftforge/forge/$fn
-      log "...trying $downloadUrl"
-      if get -o "$FORGE_INSTALLER" "$downloadUrl"; then
-        return
-      fi
-    done
-    log "Unable to locate usable URL for $normForgeVersion"
-    exit 2
- else
-    log "Downloading Forge Installer from $FORGE_INSTALLER_URL ..."
-    if ! get -o "$FORGE_INSTALLER" "$FORGE_INSTALLER_URL"; then
-      log "Failed to download from given location $FORGE_INSTALLER_URL"
-      exit 2
-    fi
-  fi
-}
-
-install() {
-  if [ ! -e "$FORGE_INSTALLER" ]; then
-    get_installer "$normForgeVersion" "$shortForgeVersion"
-  fi
-
-  # reference issue #1459
-  rm -f run.sh
-
-  log "Installing Forge $shortForgeVersion. This might take a minute or two..."
-  mkdir -p mods
-  tries=3
-  while true; do
-    if ! java -jar "$FORGE_INSTALLER" --installServer &> forge-installer.log; then
-      if ((--tries <= 0)); then
-        cat forge-installer.log
-        log "
-ERROR Forge failed to install after several tries.
-"
-        exit 1
-      fi
-      log "Install failed. Trying again..."
-    else
-      break # out of this loop
-    fi
-  done
-  # NOTE $shortForgeVersion will be empty if installer location was given to us
-  log "Finding installed server jar..."
-  unset -v latest
-  # 1.17+ ?
-  if [ -f /data/run.sh ]; then
-    latest=/data/run.sh
-  # else pre 1.17
-  else
-    for file in *forge*.jar; do
-      if ! [[ $file =~ installer ]]; then
-        if [[ -z $latest ]] || [[ $file -nt $latest ]]; then
-          latest=$file
-        fi
-      fi
-    done
-  fi
-  if [[ -z $latest ]]; then
-    log "Unable to derive server jar for Forge"
-    exit 2
-  fi
-
-  export SERVER=$latest
-  log "Using server $SERVER"
-  debug "Writing install marker at $installMarker"
-  echo "$SERVER" > "$installMarker"
-}
-
-resolve_versions() {
-  if [[ -z $FORGE_INSTALLER && -z $FORGE_INSTALLER_URL ]]; then
-    norm=$VANILLA_VERSION
-
-    case $VANILLA_VERSION in
-      *.*.*)
-        norm=$VANILLA_VERSION ;;
-      *.*)
-        norm=${VANILLA_VERSION}.0 ;;
-    esac
-
-    #################################################################################
-    promosUrl=http://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json
-
-    log "Checking Forge version information."
-    case $FORGEVERSION in
-      LATEST)
-        if ! FORGE_VERSION=$(get --json-path ".promos['$VANILLA_VERSION-latest']" --json-value-when-missing "" "$promosUrl"); then
-          log "ERROR: Version $VANILLA_VERSION is not supported by Forge"
-          log "       Refer to http://files.minecraftforge.net/ for supported versions"
-          exit 2
-        fi
-        ;;
-
-      RECOMMENDED)
-        if ! FORGE_VERSION=$(get --json-path ".promos['$VANILLA_VERSION-recommended']" --json-value-when-missing "" "$promosUrl"); then
-          if ! FORGE_VERSION=$(get --json-path ".promos['$VANILLA_VERSION-latest']" --json-value-when-missing "" "$promosUrl"); then
-            log "ERROR: Version $VANILLA_VERSION is not supported by Forge"
-            log "       Refer to http://files.minecraftforge.net/ for supported versions"
-            exit 2
-          fi
-        fi
-        ;;
-
-      *)
-        FORGE_VERSION=$FORGEVERSION
-        ;;
-    esac
-
-    normForgeVersion=$VANILLA_VERSION-$FORGE_VERSION-$norm
-    shortForgeVersion=$VANILLA_VERSION-$FORGE_VERSION
-
-    FORGE_INSTALLER="/tmp/forge-$shortForgeVersion-installer.jar"
-  elif [[ -z $FORGE_INSTALLER ]]; then
-    FORGE_INSTALLER="/tmp/forge-installer.jar"
-  elif [[ ! -e $FORGE_INSTALLER ]]; then
-    log "ERROR: the given Forge installer doesn't exist : $FORGE_INSTALLER"
-    exit 2
-  else
-    shortForgeVersion=$VANILLA_VERSION-${FORGE_INSTALLER_CUSTOM_VERSION:-custom}
-  fi
-}
-
-### main
-
-resolve_versions
-
-installMarker="/data/.forge-installed-$shortForgeVersion"
-
-if [ ! -e "$installMarker" ] || isTrue "${FORCE_REINSTALL:-false}"; then
-  install
-else
-  SERVER=$(cat "$installMarker")
-  export SERVER
-  if [ ! -e "$SERVER" ]; then
-    rm "$installMarker"
-    install
-  fi
+if ! mc-image-helper install-forge \
+  --output-directory=/data \
+  --results-file=/data/.run-forge.env \
+  --minecraft-version="${VANILLA_VERSION}" \
+  --forge-version="${FORGEVERSION}" \
+  --force-reinstall="${FORCE_REINSTALL:-false}"; then
+    log "ERROR failed to install forge"
+    exit 1
 fi
 
+# grab SERVER and export it
+set -a
+source /data/.run-forge.env
+set +a
+
 export FAMILY=FORGE
 
 exec "${SCRIPTS:-/}start-setupWorld" "$@"