diff --git a/package-lock.json b/package-lock.json
index 8c2dd8ac..9655e48d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
         "dompurify": "^3.4.13",
         "dotenv": "^17.4.2",
         "eventsource": "^5.1.0",
-        "eventsource-parser": "^3.1.1",
+        "eventsource-parser": "^4.0.0",
         "express": "^5.2.1",
         "express-fileupload": "^1.5.2",
         "express-rate-limit": "^8.6.2",
@@ -1904,6 +1904,15 @@
         "node": ">=18.0.0"
       }
     },
+    "node_modules/@modelcontextprotocol/sdk/node_modules/eventsource-parser": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/eventsource-parser/-/eventsource-parser-3.1.1.tgz",
+      "integrity": "sha512-EKN1vKAMcZ8MlYMpaNuxN6R9yakzH6uajHcHVTqWJzvu5pWw9DyhbP35HH8MVBQ+dZjAfDxk+A8NiR9KWaXiyQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
     "node_modules/@modelcontextprotocol/sdk/node_modules/json-schema-traverse": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
@@ -5740,15 +5749,6 @@
       }
     },
     "node_modules/eventsource-parser": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/eventsource-parser/-/eventsource-parser-3.1.1.tgz",
-      "integrity": "sha512-EKN1vKAMcZ8MlYMpaNuxN6R9yakzH6uajHcHVTqWJzvu5pWw9DyhbP35HH8MVBQ+dZjAfDxk+A8NiR9KWaXiyQ==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=18.0.0"
-      }
-    },
-    "node_modules/eventsource/node_modules/eventsource-parser": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/eventsource-parser/-/eventsource-parser-4.0.0.tgz",
       "integrity": "sha512-aIpvYxbqTx4KYWw73KpCt1Rh22tEAJ144F1qR76CT3Ex+LNMEPKf5HFrK5Yz9fMP1EVT0GrfA35VZvWQhMPuSQ==",
diff --git a/package.json b/package.json
index 089e93e3..15f9b29b 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "dompurify": "^3.4.13",
     "dotenv": "^17.4.2",
     "eventsource": "^5.1.0",
-    "eventsource-parser": "^3.1.1",
+    "eventsource-parser": "^4.0.0",
     "express": "^5.2.1",
     "express-fileupload": "^1.5.2",
     "express-rate-limit": "^8.6.2",