diff --git a/apps/OpenSignServer/package-lock.json b/apps/OpenSignServer/package-lock.json
index 11fe6969..208c747d 100644
--- a/apps/OpenSignServer/package-lock.json
+++ b/apps/OpenSignServer/package-lock.json
@@ -58,7 +58,7 @@
         "mongodb-runner": "^6.7.8",
         "nodemon": "^3.1.14",
         "nyc": "^18.0.0",
-        "prettier": "^3.8.3"
+        "prettier": "^3.9.6"
       },
       "engines": {
         "node": "18 || 20 || 22"
@@ -11910,9 +11910,9 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.8.3",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.3.tgz",
-      "integrity": "sha512-7igPTM53cGHMW8xWuVTydi2KO233VFiTNyF5hLJqpilHfmn8C8gPf+PS7dUT64YcXFbiMGZxS9pCSxL/Dxm/Jw==",
+      "version": "3.9.6",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.9.6.tgz",
+      "integrity": "sha512-OpN0zzVdiaiAhxpuuj5efpIS4sY9j7bY6uR5mnj5yPzGkdkjNKSJeUThPb60Jw29QuAZgA4o+/iB49kFiaBX6g==",
       "dev": true,
       "license": "MIT",
       "bin": {
diff --git a/apps/OpenSignServer/package.json b/apps/OpenSignServer/package.json
index c552065e..160a3aa9 100644
--- a/apps/OpenSignServer/package.json
+++ b/apps/OpenSignServer/package.json
@@ -69,7 +69,7 @@
     "mongodb-runner": "^6.7.8",
     "nodemon": "^3.1.14",
     "nyc": "^18.0.0",
-    "prettier": "^3.8.3"
+    "prettier": "^3.9.6"
   },
   "overrides": {
     "brace-expansion": ">=2.1.2",