diff --git a/.github/workflows/Windows.yml b/.github/workflows/Windows.yml
index 8c8e2842..36af6934 100644
--- a/.github/workflows/Windows.yml
+++ b/.github/workflows/Windows.yml
@@ -54,7 +54,7 @@ jobs:
     - name: Set ENV
       shell: cmd
       run: |
-          echo PATH=C:\tools\cygwin\bin;C:\tools\cygwin\usr\bin >> %GITHUB_ENV%
+          echo PATH=C:\tools\cygwin\bin;C:\tools\cygwin\usr\bin;%PATH% >> %GITHUB_ENV%
     - name: Check ENV
       shell: cmd
       run: |
diff --git a/acme.sh b/acme.sh
index 0c4928f5..a5ac9e47 100755
--- a/acme.sh
+++ b/acme.sh
@@ -4934,7 +4934,9 @@ $_authorizations_map"
 
   echo "$response" >"$CERT_PATH"
   _split_cert_chain "$CERT_PATH" "$CERT_FULLCHAIN_PATH" "$CA_CERT_PATH"
-
+  if [ -z "$_preferred_chain" ]; then
+    _preferred_chain=$(_readcaconf DEFAULT_PREFERRED_CHAIN)
+  fi
   if [ "$_preferred_chain" ] && [ -f "$CERT_FULLCHAIN_PATH" ]; then
     if [ "$DEBUG" ]; then
       _debug "default chain issuers: " "$(_get_chain_issuers "$CERT_FULLCHAIN_PATH")"
@@ -6547,6 +6549,8 @@ Commands:
   --deactivate             Deactivate the domain authz, professional use.
   --set-default-ca         Used with '--server', Set the default CA to use.
                            See: $_SERVER_WIKI
+  --set-default-chain      Set the default preferred chain for a CA.
+                           See: $_PREFERRED_CHAIN_WIKI
 
 
 Parameters:
@@ -6833,6 +6837,18 @@ setdefaultca() {
   _info "Changed default CA to: $(__green "$ACME_DIRECTORY")"
 }
 
+#preferred-chain
+setdefaultchain() {
+  _initpath
+  _preferred_chain="$1"
+  if [ -z "$_preferred_chain" ]; then
+    _err "Please give a '--preferred-chain value' value."
+    return 1
+  fi
+  mkdir -p "$CA_DIR"
+  _savecaconf "DEFAULT_PREFERRED_CHAIN" "$_preferred_chain"
+}
+
 _process() {
   _CMD=""
   _domain=""
@@ -6984,6 +7000,9 @@ _process() {
     --set-default-ca)
       _CMD="setdefaultca"
       ;;
+    --set-default-chain)
+      _CMD="setdefaultchain"
+      ;;
     -d | --domain)
       _dvalue="$2"
 
@@ -7514,6 +7533,9 @@ _process() {
   setdefaultca)
     setdefaultca
     ;;
+  setdefaultchain)
+    setdefaultchain "$_preferred_chain"
+    ;;
   *)
     if [ "$_CMD" ]; then
       _err "Invalid command: $_CMD"