diff --git a/package.json b/package.json
index 8193edb16..211256fb7 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "jscodeshift": "^17.1.1",
     "lerna": "^8.0.0",
     "npm-run-all2": "^6.0.0",
-    "prettier": "3.3.3",
+    "prettier": "3.4.2",
     "textlint": "^14.0.0",
     "textlint-rule-preset-ameba": "openameba/textlint-rule-preset-ameba#v0.5.1",
     "typescript": "4.8.2",
diff --git a/yarn.lock b/yarn.lock
index c200a9ca5..8401f4a42 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -20521,10 +20521,10 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@3.3.3:
-  version "3.3.3"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.3.3.tgz#30c54fe0be0d8d12e6ae61dbb10109ea00d53105"
-  integrity sha512-i2tDNA0O5IrMO757lfrdQZCc2jPNDVntV0m/+4whiDfWaTKfMNgR7Qz0NAeGz/nRqF4m5/6CLzbP4/liHt12Ew==
+prettier@3.4.2:
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.4.2.tgz#a5ce1fb522a588bf2b78ca44c6e6fe5aa5a2b13f"
+  integrity sha512-e9MewbtFo+Fevyuxn/4rrcDAaq0IYxPGLvObpQjiZBMAzB9IGmzlnG9RZy3FFas+eBMu2vA0CszMeduow5dIuQ==
 
 "prettier@>=2.2.1 <=2.3.0":
   version "2.3.0"