diff --git a/package-lock.json b/package-lock.json
index c81c74b..b4c8b8c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4518,7 +4518,7 @@
     },
     "node_modules/@clack/prompts/node_modules/is-unicode-supported": {
       "version": "1.3.0",
-      "extraneous": true,
+      "dev": true,
       "inBundle": true,
       "license": "MIT",
       "engines": {
diff --git a/packages/ol-gsi-vt/src/layers/gsi-opt-vt-pale.ts b/packages/ol-gsi-vt/src/layers/gsi-opt-vt-pale.ts
index fcd9180..384fb42 100644
--- a/packages/ol-gsi-vt/src/layers/gsi-opt-vt-pale.ts
+++ b/packages/ol-gsi-vt/src/layers/gsi-opt-vt-pale.ts
@@ -12,7 +12,7 @@ function gsiOptVtPaleLayer({
   declutter = true,
   background,
   ...vectorTileOptions
-}: GsiOptVtLayerOptions) {
+}: GsiOptVtLayerOptions = {}) {
   return new VectorTileLayer({
     source: new PMTilesVectorSource({
       url: "https://cyberjapandata.gsi.go.jp/xyz/optimal_bvmap-v1/optimal_bvmap-v1.pmtiles",
diff --git a/packages/ol-gsi-vt/src/layers/gsi-opt-vt.ts b/packages/ol-gsi-vt/src/layers/gsi-opt-vt.ts
index 79060e0..4963120 100644
--- a/packages/ol-gsi-vt/src/layers/gsi-opt-vt.ts
+++ b/packages/ol-gsi-vt/src/layers/gsi-opt-vt.ts
@@ -12,7 +12,7 @@ function gsiOptVtLayer({
   declutter = true,
   background,
   ...vectorTileOptions
-}: GsiOptVtLayerOptions) {
+}: GsiOptVtLayerOptions = {}) {
   return new VectorTileLayer({
     source: new PMTilesVectorSource({
       url: "https://cyberjapandata.gsi.go.jp/xyz/optimal_bvmap-v1/optimal_bvmap-v1.pmtiles",
diff --git a/packages/ol-gsi-vt/src/layers/gsi-vt-pale.ts b/packages/ol-gsi-vt/src/layers/gsi-vt-pale.ts
index 9ca963b..ac82b4a 100644
--- a/packages/ol-gsi-vt/src/layers/gsi-vt-pale.ts
+++ b/packages/ol-gsi-vt/src/layers/gsi-vt-pale.ts
@@ -13,7 +13,7 @@ function gsiVtPaleLayer({
   declutter = true,
   background,
   ...vectorTileOptions
-}: GsiVtLayerOptions) {
+}: GsiVtLayerOptions = {}) {
   return new VectorTileLayer({
     source: new VectorTileSource({
       format: new MVTFormat({
diff --git a/packages/ol-gsi-vt/src/layers/gsi-vt.ts b/packages/ol-gsi-vt/src/layers/gsi-vt.ts
index 27fdbd1..7626438 100644
--- a/packages/ol-gsi-vt/src/layers/gsi-vt.ts
+++ b/packages/ol-gsi-vt/src/layers/gsi-vt.ts
@@ -13,7 +13,7 @@ function gsiVtLayer({
   declutter = true,
   background,
   ...vectorTileOptions
-}: GsiVtLayerOptions) {
+}: GsiVtLayerOptions = {}) {
   return new VectorTileLayer({
     source: new VectorTileSource({
       format: new MVTFormat({