diff --git a/package-lock.json b/package-lock.json
index bb64a3b1..f5a96bcd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,7 +7,7 @@
       "devDependencies": {
         "@proofdict/textlint-rule-proofdict": "3.1.2",
         "@textlint-ja/textlint-rule-no-insert-dropping-sa": "2.0.1",
-        "prettier": "3.4.1",
+        "prettier": "3.4.2",
         "textlint": "14.4.0",
         "textlint-filter-rule-comments": "1.2.2",
         "textlint-rule-abbr-within-parentheses": "1.0.2",
@@ -4012,9 +4012,9 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.4.1",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.4.1.tgz",
-      "integrity": "sha512-G+YdqtITVZmOJje6QkXQWzl3fSfMxFwm1tjTyo9exhkmWSqC4Yhd1+lug++IlR2mvRVAxEDDWYkQdeSztajqgg==",
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.4.2.tgz",
+      "integrity": "sha512-e9MewbtFo+Fevyuxn/4rrcDAaq0IYxPGLvObpQjiZBMAzB9IGmzlnG9RZy3FFas+eBMu2vA0CszMeduow5dIuQ==",
       "dev": true,
       "license": "MIT",
       "bin": {
diff --git a/package.json b/package.json
index 896ea9a6..32f4288d 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "devDependencies": {
     "@proofdict/textlint-rule-proofdict": "3.1.2",
     "@textlint-ja/textlint-rule-no-insert-dropping-sa": "2.0.1",
-    "prettier": "3.4.1",
+    "prettier": "3.4.2",
     "textlint": "14.4.0",
     "textlint-filter-rule-comments": "1.2.2",
     "textlint-rule-abbr-within-parentheses": "1.0.2",