diff --git a/package-lock.json b/package-lock.json
index d42a46c4..dad6acd6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -36,7 +36,7 @@
         "eslint-config-teppeis": "^19.1.2",
         "mocha": "^10.8.2",
         "npm-run-all": "^4.1.5",
-        "prettier": "^3.3.3",
+        "prettier": "^3.4.1",
         "rimraf": "^5.0.10",
         "sinon": "^17.0.2",
         "tempy": "^3.1.0",
@@ -4807,9 +4807,9 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.3.3.tgz",
-      "integrity": "sha512-i2tDNA0O5IrMO757lfrdQZCc2jPNDVntV0m/+4whiDfWaTKfMNgR7Qz0NAeGz/nRqF4m5/6CLzbP4/liHt12Ew==",
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.4.1.tgz",
+      "integrity": "sha512-G+YdqtITVZmOJje6QkXQWzl3fSfMxFwm1tjTyo9exhkmWSqC4Yhd1+lug++IlR2mvRVAxEDDWYkQdeSztajqgg==",
       "dev": true,
       "license": "MIT",
       "bin": {
diff --git a/package.json b/package.json
index 0947b0e5..31f7b3a9 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "eslint-config-teppeis": "^19.1.2",
     "mocha": "^10.8.2",
     "npm-run-all": "^4.1.5",
-    "prettier": "^3.3.3",
+    "prettier": "^3.4.1",
     "rimraf": "^5.0.10",
     "sinon": "^17.0.2",
     "tempy": "^3.1.0",