diff --git a/package-lock.json b/package-lock.json
index 9c94798a5b..2efa4fa9ee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -85,7 +85,7 @@
         "@typescript-eslint/parser": "8.26.1",
         "@uupaa/dynamic-import-polyfill": "1.0.2",
         "@vitest/coverage-v8": "3.0.8",
-        "autoprefixer": "10.4.20",
+        "autoprefixer": "10.4.21",
         "babel-loader": "9.2.1",
         "clean-webpack-plugin": "4.0.0",
         "confusing-browser-globals": "1.0.11",
@@ -7040,9 +7040,9 @@
       }
     },
     "node_modules/autoprefixer": {
-      "version": "10.4.20",
-      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.20.tgz",
-      "integrity": "sha512-XY25y5xSv/wEoqzDyXXME4AFfkZI0P23z6Fs3YgymDnKJkCGOnkL0iTxCa85UTqaSgfcqyf3UA6+c7wUvx/16g==",
+      "version": "10.4.21",
+      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.21.tgz",
+      "integrity": "sha512-O+A6LWV5LDHSJD3LjHYoNi4VLsj/Whi7k6zG12xTYaU4cQ8oxQGckXNX8cRHK5yOZ/ppVHe0ZBXGzSV9jXdVbQ==",
       "dev": true,
       "funding": [
         {
@@ -7060,11 +7060,11 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "browserslist": "^4.23.3",
-        "caniuse-lite": "^1.0.30001646",
+        "browserslist": "^4.24.4",
+        "caniuse-lite": "^1.0.30001702",
         "fraction.js": "^4.3.7",
         "normalize-range": "^0.1.2",
-        "picocolors": "^1.0.1",
+        "picocolors": "^1.1.1",
         "postcss-value-parser": "^4.2.0"
       },
       "bin": {
@@ -7813,9 +7813,9 @@
       "dev": true
     },
     "node_modules/caniuse-lite": {
-      "version": "1.0.30001700",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001700.tgz",
-      "integrity": "sha512-2S6XIXwaE7K7erT8dY+kLQcpa5ms63XlRkMkReXjle+kf6c5g38vyMl+Z5y8dSxOFDhcFe+nxnn261PLxBSQsQ==",
+      "version": "1.0.30001706",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001706.tgz",
+      "integrity": "sha512-3ZczoTApMAZwPKYWmwVbQMFpXBDds3/0VciVoUwPUbldlYyVLmRVuRs/PcUZtHpbLRpzzDvrvnFuREsGt6lUug==",
       "dev": true,
       "funding": [
         {
@@ -30089,16 +30089,16 @@
       "dev": true
     },
     "autoprefixer": {
-      "version": "10.4.20",
-      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.20.tgz",
-      "integrity": "sha512-XY25y5xSv/wEoqzDyXXME4AFfkZI0P23z6Fs3YgymDnKJkCGOnkL0iTxCa85UTqaSgfcqyf3UA6+c7wUvx/16g==",
+      "version": "10.4.21",
+      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.21.tgz",
+      "integrity": "sha512-O+A6LWV5LDHSJD3LjHYoNi4VLsj/Whi7k6zG12xTYaU4cQ8oxQGckXNX8cRHK5yOZ/ppVHe0ZBXGzSV9jXdVbQ==",
       "dev": true,
       "requires": {
-        "browserslist": "^4.23.3",
-        "caniuse-lite": "^1.0.30001646",
+        "browserslist": "^4.24.4",
+        "caniuse-lite": "^1.0.30001702",
         "fraction.js": "^4.3.7",
         "normalize-range": "^0.1.2",
-        "picocolors": "^1.0.1",
+        "picocolors": "^1.1.1",
         "postcss-value-parser": "^4.2.0"
       }
     },
@@ -30628,9 +30628,9 @@
       "dev": true
     },
     "caniuse-lite": {
-      "version": "1.0.30001700",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001700.tgz",
-      "integrity": "sha512-2S6XIXwaE7K7erT8dY+kLQcpa5ms63XlRkMkReXjle+kf6c5g38vyMl+Z5y8dSxOFDhcFe+nxnn261PLxBSQsQ==",
+      "version": "1.0.30001706",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001706.tgz",
+      "integrity": "sha512-3ZczoTApMAZwPKYWmwVbQMFpXBDds3/0VciVoUwPUbldlYyVLmRVuRs/PcUZtHpbLRpzzDvrvnFuREsGt6lUug==",
       "dev": true
     },
     "canvas": {
diff --git a/package.json b/package.json
index 4c524791fc..316d55236c 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "@typescript-eslint/parser": "8.26.1",
     "@uupaa/dynamic-import-polyfill": "1.0.2",
     "@vitest/coverage-v8": "3.0.8",
-    "autoprefixer": "10.4.20",
+    "autoprefixer": "10.4.21",
     "babel-loader": "9.2.1",
     "clean-webpack-plugin": "4.0.0",
     "confusing-browser-globals": "1.0.11",