diff --git a/luci-app-store/Makefile b/luci-app-store/Makefile
index e8ca464bf..c84b248c9 100644
--- a/luci-app-store/Makefile
+++ b/luci-app-store/Makefile
@@ -11,13 +11,13 @@ LUCI_DEPENDS:=+curl +opkg +luci-base +tar +libuci-lua +mount-utils +luci-lib-tas
 LUCI_EXTRA_DEPENDS:=luci-lib-taskd (>=1.0.19)
 LUCI_PKGARCH:=all
 
-PKG_VERSION:=0.1.29-3
+PKG_VERSION:=0.1.29-4
 # PKG_RELEASE MUST be empty for luci.mk
 PKG_RELEASE:=
 
 ISTORE_UI_VERSION:=0.1.28
-ISTORE_UI_RELEASE:=1
-PKG_HASH:=c45d7552a4c52fdd2f5a2a9bbc94d14a66c5af187ef8a117a3e08b6a9a4b7dbf
+ISTORE_UI_RELEASE:=2
+PKG_HASH:=c83eb15c65ca0d4368beda8977b29ae6f496afa5c3bd1ad898c9e12abeabdd46
 
 PKG_SOURCE_URL_FILE:=v$(ISTORE_UI_VERSION)-$(ISTORE_UI_RELEASE).tar.gz
 PKG_SOURCE:=istore-ui-$(PKG_SOURCE_URL_FILE)
diff --git a/luci-app-store/root/usr/libexec/istore/overlay-backup b/luci-app-store/root/usr/libexec/istore/overlay-backup
index a8b97a9e3..b260231dc 100755
--- a/luci-app-store/root/usr/libexec/istore/overlay-backup
+++ b/luci-app-store/root/usr/libexec/istore/overlay-backup
@@ -134,19 +134,24 @@ restore() {
     # prevent uci cache
     rm -rf /var/run/uci
 
+    SANDBOX_UUID=
+    SANDBOX_LABEL=
+    SANDBOX_DEVICE=
     local tar_extra_args=overlay/upper
     if has_ext_overlay; then
         tar_extra_args=
-        local uuid label device line
-        local uci_section=$(uci -c /overlay/upper/etc/config show fstab | grep '^fstab\.@mount\[[0-9]*\]\.target='"'/overlay'\$" | head -1 | grep -o '^fstab\.@mount\[[0-9]*\]')
-        while read line; do
-            export -n "$line"
-        done < <(
-            uci -c /overlay/upper/etc/config show "$uci_section" | sed -e '/^fstab\.[^\.]*=/d' -e 's/^fstab\.[^\.]*\.//g' | grep -e '^uuid=' -e '^label=' -e '^device=' | sed "s/'//g"
-        )
-        SANDBOX_UUID=$uuid
-        SANDBOX_LABEL=$label
-        SANDBOX_DEVICE=$device
+        if echo "${BACKUP_PATH_FILE}" | grep -q '\.s\.overlay\.tar\.gz$' ; then
+            local uuid label device line
+            local uci_section=$(uci -c /overlay/upper/etc/config show fstab | grep '^fstab\.@mount\[[0-9]*\]\.target='"'/overlay'\$" | head -1 | grep -o '^fstab\.@mount\[[0-9]*\]')
+            while read line; do
+                export -n "$line"
+            done < <(
+                uci -c /overlay/upper/etc/config show "$uci_section" | sed -e '/^fstab\.[^\.]*=/d' -e 's/^fstab\.[^\.]*\.//g' | grep -e '^uuid=' -e '^label=' -e '^device=' | sed "s/'//g"
+            )
+            SANDBOX_UUID=$uuid
+            SANDBOX_LABEL=$label
+            SANDBOX_DEVICE=$device
+        fi
     fi
 
     sync /
@@ -174,12 +179,18 @@ supports_overlay_backup() {
     return 0
 }
 
+filter_backups() {
+    if has_ext_overlay; then
+        cat
+    else
+        # do not support restoring sandbox backup on non sandbox env
+        grep -v '\.s\.overlay\.tar\.gz$'
+    fi
+}
+
 get_backup_file_list() {
-    local backup_file
     if [ -n "$1" ]; then
-        for backup_file in `cd $1 && ls backup_overlay_*.overlay.tar.gz`; do
-            echo "${backup_file}"
-        done
+        ( cd "$1" && ls backup_overlay_*.overlay.tar.gz | filter_backups )
     else
         echo "input backup path is null"
         exit 1