diff --git a/package-lock.json b/package-lock.json
index e6608e0..c182f16 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.3.1",
       "license": "MIT",
       "dependencies": {
-        "postcss-styled-syntax": "0.6.4",
+        "postcss-styled-syntax": "0.7.0",
         "stylelint-config-standard": "36.0.1"
       },
       "devDependencies": {
@@ -7439,11 +7439,12 @@
       }
     },
     "node_modules/postcss-styled-syntax": {
-      "version": "0.6.4",
-      "resolved": "https://registry.npmjs.org/postcss-styled-syntax/-/postcss-styled-syntax-0.6.4.tgz",
-      "integrity": "sha512-uWiLn+9rKgIghUYmTHvXMR6MnyPULMe9Gv3bV537Fg4FH6CA6cn21WMjKss2Qb98LUhT847tKfnRGG3FhSOgUQ==",
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/postcss-styled-syntax/-/postcss-styled-syntax-0.7.0.tgz",
+      "integrity": "sha512-OeStzPkHJ1/WDGRKm/JuVK8UdJbjt3U7AFC+zUc9omJ79SaXSxWoy+PXxJz7t8vOO8HcUgCLndNEQfLvZ74TuQ==",
+      "license": "MIT",
       "dependencies": {
-        "typescript": "^5.3.3"
+        "typescript": "^5.6.3"
       },
       "engines": {
         "node": ">=14.17"
@@ -7452,6 +7453,19 @@
         "postcss": "^8.4.21"
       }
     },
+    "node_modules/postcss-styled-syntax/node_modules/typescript": {
+      "version": "5.6.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.6.3.tgz",
+      "integrity": "sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==",
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
     "node_modules/postcss-value-parser": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz",
@@ -9120,6 +9134,7 @@
       "version": "5.4.5",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.5.tgz",
       "integrity": "sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ==",
+      "devOptional": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
diff --git a/package.json b/package.json
index d58e6a1..5728dff 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   "author": "cybozu",
   "license": "MIT",
   "dependencies": {
-    "postcss-styled-syntax": "0.6.4",
+    "postcss-styled-syntax": "0.7.0",
     "stylelint-config-standard": "36.0.1"
   },
   "devDependencies": {