diff --git a/package-lock.json b/package-lock.json
index d776f14..2dd68ab 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,7 @@
       },
       "devDependencies": {
         "@kubosho/configs": "^4.0.19",
-        "@vivliostyle/cli": "^8.17.2"
+        "@vivliostyle/cli": "^8.18.0"
       },
       "engines": {
         "node": "20.17.0"
@@ -3259,9 +3259,9 @@
       "license": "ISC"
     },
     "node_modules/@vivliostyle/cli": {
-      "version": "8.17.2",
-      "resolved": "https://registry.npmjs.org/@vivliostyle/cli/-/cli-8.17.2.tgz",
-      "integrity": "sha512-AZM+ABaTlXeZRVBgpLmYtGaf7SNGF+rA8/z1DvHQJfSEbkM9yfwVDQiB5+8fgrOis1FvLJj1uD2sGcI43LW+bw==",
+      "version": "8.18.0",
+      "resolved": "https://registry.npmjs.org/@vivliostyle/cli/-/cli-8.18.0.tgz",
+      "integrity": "sha512-oAjw0q0qd4iD/6fJTIPWEi1gibsvGF3mXCVCwlueXIMAHbzPnImtFbNuawMrZbWYhGCwS7AAKNJI5ede18aPeg==",
       "dev": true,
       "dependencies": {
         "@babel/code-frame": "^7.24.7",
@@ -3270,7 +3270,7 @@
         "@npmcli/arborist": "^6.1.3",
         "@vivliostyle/jsdom": "22.1.0-vivliostyle-cli.1",
         "@vivliostyle/vfm": "2.2.1",
-        "@vivliostyle/viewer": "2.30.8",
+        "@vivliostyle/viewer": "2.31.0",
         "ajv": "^8.11.2",
         "ajv-formats": "^2.1.1",
         "archiver": "^5.3.1",
@@ -3329,9 +3329,9 @@
       }
     },
     "node_modules/@vivliostyle/core": {
-      "version": "2.30.8",
-      "resolved": "https://registry.npmjs.org/@vivliostyle/core/-/core-2.30.8.tgz",
-      "integrity": "sha512-UhHxIwH/lHY0l3Z8Cjl6wX94gKewatDXFanJ6p6j890svBy/tDR9tooBg76p6Cjr/+pXl42ToLPCRWVfdFn8lA==",
+      "version": "2.31.0",
+      "resolved": "https://registry.npmjs.org/@vivliostyle/core/-/core-2.31.0.tgz",
+      "integrity": "sha512-Wvam0xaN2BqYyVm5A1KsLaHcJOH/hax0ZN6r68Ic9Dq79fEzBAWBgyhOm4TB69FOTdwfDrBgxp2OIAbNR+aQ3g==",
       "dev": true,
       "dependencies": {
         "fast-diff": "^1.2.0"
@@ -3478,12 +3478,12 @@
       }
     },
     "node_modules/@vivliostyle/viewer": {
-      "version": "2.30.8",
-      "resolved": "https://registry.npmjs.org/@vivliostyle/viewer/-/viewer-2.30.8.tgz",
-      "integrity": "sha512-6cabEaRmC+y2RwGv6viHnw9oDdsOZKNWsu8MoLLnALTNqy+f2z2hs1pJm5H3/VH9dihzNWLATSKnX5WragtQNA==",
+      "version": "2.31.0",
+      "resolved": "https://registry.npmjs.org/@vivliostyle/viewer/-/viewer-2.31.0.tgz",
+      "integrity": "sha512-BuEqBtkbT5Qeg2F50twPEmJ2rq3UMSwyv9FDK1rUPx4QPPXCuXK8kdSkDAeBm8A+/NygdGdRtZd/8QwwC8yHRg==",
       "dev": true,
       "dependencies": {
-        "@vivliostyle/core": "^2.30.8",
+        "@vivliostyle/core": "^2.31.0",
         "i18next-ko": "^3.0.1",
         "knockout": "^3.5.0"
       },
diff --git a/package.json b/package.json
index 0559a57..6c4c7aa 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "@kubosho/configs": "^4.0.19",
-    "@vivliostyle/cli": "^8.17.2"
+    "@vivliostyle/cli": "^8.18.0"
   },
   "dependencies": {
     "@o2project/vivliostyle-theme-o2project": "^2.8.1"