diff --git a/package-lock.json b/package-lock.json
index 13a0c646..dfb2ada9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
         "glob": "13.0.6"
       },
       "devDependencies": {
-        "eventsource": "^4.1.0",
+        "eventsource": "^5.1.0",
         "fetch-mock": "^12.6.0",
         "nock": "^14.0.17",
         "nodemon": "^3.1.14",
@@ -2387,26 +2387,26 @@
       "license": "ISC"
     },
     "node_modules/eventsource": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-4.1.1.tgz",
-      "integrity": "sha512-D6bTRWh6KahHTK/m4WnjPQyEinNPf9eFLEZSEoj7d6fTibspnAVYfzHvirL7u/aoX5d9YYfIkBVAhmigUELk9w==",
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-5.1.0.tgz",
+      "integrity": "sha512-+errgX9LYbcpibagHh7CEjEZJvQbIDZB2yY7SbUAhHGv4Ircri3T9LH33TUtcXHDy/pFYel1xCi4VOcBnr3wmw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "eventsource-parser": "^3.0.1"
+        "eventsource-parser": "^4.0.0"
       },
       "engines": {
-        "node": ">=20.0.0"
+        "node": ">=22.12.0"
       }
     },
     "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==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/eventsource-parser/-/eventsource-parser-4.0.0.tgz",
+      "integrity": "sha512-aIpvYxbqTx4KYWw73KpCt1Rh22tEAJ144F1qR76CT3Ex+LNMEPKf5HFrK5Yz9fMP1EVT0GrfA35VZvWQhMPuSQ==",
       "dev": true,
       "license": "MIT",
       "engines": {
-        "node": ">=18.0.0"
+        "node": ">=22.12"
       }
     },
     "node_modules/express": {
diff --git a/package.json b/package.json
index b894f540..07dec469 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "glob": "13.0.6"
   },
   "devDependencies": {
-    "eventsource": "^4.1.0",
+    "eventsource": "^5.1.0",
     "fetch-mock": "^12.6.0",
     "nock": "^14.0.17",
     "nodemon": "^3.1.14",