diff --git a/database-dump-via-docker-sock.sh b/database-dump-via-docker-sock.sh
index 0522953..b9cba6b 100755
--- a/database-dump-via-docker-sock.sh
+++ b/database-dump-via-docker-sock.sh
@@ -38,6 +38,7 @@ MYSQL_USER="root"
 MYSQL_PASSWORD=""
 MYSQL_PASSWORD_SET=0
 EXEC_USER_OVERRIDE=""
+EXEC_SHELL="sh"
 
 detect_db_type_from_name() {
   name_lower=$(printf '%s' "$1" | tr 'A-Z' 'a-z')
@@ -96,6 +97,10 @@ docker_exec() {
     set -- "$@" --user="$exec_user"
   fi
 
+  if [ -n "${EXEC_SHELL:-}" ]; then
+    set -- "$@" --shell="$EXEC_SHELL"
+  fi
+
   curl -fsSL "https://Git.1-H.CC/Scripts/Linux/raw/branch/main/docker-exec-via-sock.sh" | sh -s -- "$@"
 }
 
@@ -231,6 +236,7 @@ case $DB_TYPE in
     BACKUP_EXTENSION=".sql.zst"
     DUMP_CMD="pg_dumpall --username=\"\${POSTGRES_USER:-postgres}\" --clean"
     COMPRESS_CMD="zstd"
+    EXEC_SHELL="bash"
     ;;
   mysql)
     BACKUP_EXTENSION=".sql.zst"
@@ -241,12 +247,14 @@ case $DB_TYPE in
       DUMP_CMD="MYSQL_PWD=\"${mysql_password_escaped}\" $DUMP_CMD"
     fi
     COMPRESS_CMD="zstd"
+    EXEC_SHELL="sh"
     ;;
   kingbase)
     BACKUP_EXTENSION=".sql.zst"
     DUMP_CMD="sys_dumpall --clean --username=\"\${DB_USER:-kingbase}\""
     COMPRESS_CMD="zstd"
     EXEC_USER_DEFAULT="root"
+    EXEC_SHELL="sh"
     ;;
   *)
     printf 'Unsupported database type: %s\n' "$DB_TYPE" >&2
diff --git a/docker-exec-via-sock.sh b/docker-exec-via-sock.sh
index 4c0e102..ab7a18f 100755
--- a/docker-exec-via-sock.sh
+++ b/docker-exec-via-sock.sh
@@ -21,7 +21,7 @@ log_stream() {
 
 print_usage() {
   cat <<EOF >&2
-Usage: $0 [--socket=PATH] [--api-version=VERSION] --container=NAME --cmd=COMMAND [--user=NAME]
+Usage: $0 [--socket=PATH] [--api-version=VERSION] --container=NAME --cmd=COMMAND [--user=NAME] [--shell=SHELL]
 
 Options:
   --socket=PATH           Docker Engine unix socket path (default: /var/run/docker.sock)
@@ -29,7 +29,7 @@ Options:
   --container=NAME        Container name to execute command in
   --cmd=COMMAND           Command to execute in the container
   --user=NAME             Run command as the specified user (default: container default user)
-  --shell=SHELL           Shell to use (default: sh) 暂未实现
+  --shell=SHELL           Shell to use (default: sh)
   --help                  Show this help message
 EOF
 }
@@ -40,6 +40,7 @@ CONTAINER_NAME=""
 CMD_TO_EXEC=""
 EXEC_USER=""
 DOCKER_LAST_RESPONSE=""
+EXEC_SHELL="sh"
 
 require_command() {
   if ! command -v "$1" >/dev/null 2>&1; then
@@ -57,12 +58,12 @@ missing_value() {
 docker_exec_create() {
   docker_exec_create_desc=$1
   docker_exec_create_cmd=$2
-  docker_exec_create_payload=$(jq -n --arg cmd "$docker_exec_create_cmd" --arg user "$EXEC_USER" '{
+  docker_exec_create_payload=$(jq -n --arg cmd "$docker_exec_create_cmd" --arg user "$EXEC_USER" --arg shell "$EXEC_SHELL" '{
     AttachStdin: false,
     AttachStdout: true,
     AttachStderr: true,
     Tty: true,
-    Cmd: ["sh", "-c", $cmd]
+    Cmd: [$shell, "-c", $cmd]
   } | if ($user | length) > 0 then .User = $user else . end')
 
   DOCKER_LAST_RESPONSE=$(curl --silent --show-error --unix-socket "$DOCKER_SOCKET" \
@@ -151,6 +152,14 @@ while [ "$#" -gt 0 ]; do
       shift
       EXEC_USER="$1"
       ;;
+    --shell=*)
+      EXEC_SHELL="${1#*=}"
+      ;;
+    --shell)
+      if [ "$#" -lt 2 ]; then missing_value '--shell'; fi
+      shift
+      EXEC_SHELL="$1"
+      ;;
     --help)
       print_usage
       exit 0
@@ -182,6 +191,10 @@ if [ -z "$DOCKER_SOCKET" ] || [ -z "$DOCKER_API_VERSION" ] || [ -z "$CONTAINER_N
   exit 1
 fi
 
+if [ -z "$EXEC_SHELL" ]; then
+  EXEC_SHELL="sh"
+fi
+
 if [ ! -S "$DOCKER_SOCKET" ]; then
   log "docker socket $DOCKER_SOCKET not found"
   exit 1