diff --git a/package-lock.json b/package-lock.json
index 6f83befc..3265445c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -36,7 +36,7 @@
         "lockfile-lint": "5.0.0",
         "ls-engines": "0.10.1",
         "npm-run-all2": "9.0.2",
-        "prettier": "3.8.5",
+        "prettier": "3.9.0",
         "publint": "0.3.21",
         "semantic-release": "25.0.5",
         "sinon": "22.0.0",
@@ -10455,9 +10455,9 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.8.5",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.5.tgz",
-      "integrity": "sha512-zxcTTCedNGJM4R8sj/Cq/F0W/c4iE0afWBcBwMTRtw4WHYP9TWkYjdiH3npPRUYsXQCPR0hTU9yjovOu+E6EQA==",
+      "version": "3.9.0",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.9.0.tgz",
+      "integrity": "sha512-LjIqSIC5VYLzs9WedVmJ2ljNAGnU+DteIClbahu4L/DBeWjZ6iT/k1lAYyu9JUh+1xINxWadaPw/Pl63y/agAw==",
       "dev": true,
       "license": "MIT",
       "bin": {
diff --git a/package.json b/package.json
index fc598f84..787f8f00 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "lockfile-lint": "5.0.0",
     "ls-engines": "0.10.1",
     "npm-run-all2": "9.0.2",
-    "prettier": "3.8.5",
+    "prettier": "3.9.0",
     "publint": "0.3.21",
     "semantic-release": "25.0.5",
     "sinon": "22.0.0",