diff --git a/backend/package.json b/backend/package.json
index 1534f1b..23da1dd 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -48,7 +48,7 @@
     "@types/swagger-jsdoc": "^6.0.4",
     "@types/swagger-ui-express": "^4.1.6",
     "@vitest/coverage-v8": "^2.1.8",
-    "eventsource": "^2.0.2",
+    "eventsource": "^4.1.0",
     "nodemon": "^3.1.11",
     "prisma": "^7.8.0",
     "rollup": "^4.61.0",
diff --git a/package-lock.json b/package-lock.json
index f40e602..12cc44f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -57,7 +57,7 @@
         "@types/swagger-jsdoc": "^6.0.4",
         "@types/swagger-ui-express": "^4.1.6",
         "@vitest/coverage-v8": "^2.1.8",
-        "eventsource": "^2.0.2",
+        "eventsource": "^4.1.0",
         "nodemon": "^3.1.11",
         "prisma": "^7.8.0",
         "rollup": "^4.61.0",
@@ -76,6 +76,19 @@
         "undici-types": "~7.18.0"
       }
     },
+    "backend/node_modules/eventsource": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-4.1.0.tgz",
+      "integrity": "sha512-2GuF51iuHX6A9xdTccMTsNb7VO0lHZihApxhvQzJB5A03DvHDd2FQepodbMaztPBmBcE/ox7o2gqaxGhYB9LhQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "eventsource-parser": "^3.0.1"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
     "frontend": {
       "version": "0.1.0",
       "dependencies": {
@@ -6309,6 +6322,16 @@
         "node": ">=12.0.0"
       }
     },
+    "node_modules/eventsource-parser": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/eventsource-parser/-/eventsource-parser-3.1.0.tgz",
+      "integrity": "sha512-kJezFj9YFAMLeORyi7aCLxLbD5/qWMQnoMVlVPyHIll7lgRJCc3JVln9Vgl9nwQi0YkMnhdGTMNn7CkRRAptMg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
     "node_modules/expect-type": {
       "version": "1.3.0",
       "dev": true,