diff --git a/packages/real-time/package.json b/packages/real-time/package.json
index f60ca174d..8762e0eae 100644
--- a/packages/real-time/package.json
+++ b/packages/real-time/package.json
@@ -33,7 +33,7 @@
     "@stryker-mutator/typescript-checker": "catalog:",
     "eslint": "catalog:",
     "eslint-config-mte": "workspace:*",
-    "eventsource": "5.0.0",
+    "eventsource": "5.1.0",
     "mutation-testing-report-schema": "workspace:*",
     "rxjs": "7.8.2"
   }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 78b03798b..4f6294806 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -240,8 +240,8 @@ importers:
         specifier: workspace:*
         version: link:../eslint-config-mte
       eventsource:
-        specifier: 5.0.0
-        version: 5.0.0
+        specifier: 5.1.0
+        version: 5.1.0
       mutation-testing-report-schema:
         specifier: workspace:*
         version: link:../report-schema
@@ -2348,8 +2348,8 @@ packages:
     resolution: {integrity: sha512-aIpvYxbqTx4KYWw73KpCt1Rh22tEAJ144F1qR76CT3Ex+LNMEPKf5HFrK5Yz9fMP1EVT0GrfA35VZvWQhMPuSQ==}
     engines: {node: '>=22.12'}
 
-  eventsource@5.0.0:
-    resolution: {integrity: sha512-iNd5IgeR56Om1Aje0ACZTd5oRQ+u5i6RfRkKdIuhlykeH3o+f0vIiiT0i9t1SXABfTnsfxVPadAB2T4cLS32Sw==}
+  eventsource@5.1.0:
+    resolution: {integrity: sha512-+errgX9LYbcpibagHh7CEjEZJvQbIDZB2yY7SbUAhHGv4Ircri3T9LH33TUtcXHDy/pFYel1xCi4VOcBnr3wmw==}
     engines: {node: '>=22.12.0'}
 
   execa@5.0.0:
@@ -6285,7 +6285,7 @@ snapshots:
 
   eventsource-parser@4.0.0: {}
 
-  eventsource@5.0.0:
+  eventsource@5.1.0:
     dependencies:
       eventsource-parser: 4.0.0