diff --git a/oci/create_instance.sh b/oci/create_instance.sh
index ad2d3bc..ddd6c2d 100644
--- a/oci/create_instance.sh
+++ b/oci/create_instance.sh
@@ -77,7 +77,7 @@ load_common_libs
 readonly DEFAULT_NUMBER=1
 readonly DEFAULT_SHAPE="VM.Standard.A1.Flex"
 readonly DEFAULT_SHAPE_CONFIG="1+6"
-readonly DEFAULT_IMAGE_NAME="Canonical-Ubuntu-20.04-aarch64-2025.05.20-0"
+readonly DEFAULT_IMAGE_NAME="Canonical-Ubuntu-20.04-aarch64-2025.07.23-0"
 readonly DEFAULT_BOOT_VOLUME_SIZE=0
 readonly DEFAULT_VPU=120
 readonly DEFAULT_DOMAIN=0
@@ -361,7 +361,7 @@ main() {
         local fifo
         fifo=$(mktemp -u)
         mkfifo "$fifo"
-        trap 'rm -f "$fifo"' EXIT
+        trap "rm -f \"$fifo\"" EXIT
         configure_network "$ocid" "$fifo" &
         read subnet_id < "$fifo"
         log_success "网络配置完成 (子网ID: $subnet_id)"