diff --git a/package-lock.json b/package-lock.json
index ce7527a..ed90656 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
       "devDependencies": {
         "@netlify/functions": "^4.0.0",
         "nock": "^14.0.5",
-        "smee-client": "^2.0.4",
+        "smee-client": "^4.0.0",
         "uvu": "^0.5.1"
       },
       "engines": {
@@ -4258,13 +4258,26 @@
       }
     },
     "node_modules/eventsource": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-2.0.2.tgz",
-      "integrity": "sha512-IzUmBGPR3+oUG9dUeXynyNmf91/3zUSJg1lCktzKw47OXuhco54U3r9B7O4XX+Rb1Itm9OZ2b0RkTs10bICOxA==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-4.0.0.tgz",
+      "integrity": "sha512-fvIkb9qZzdMxgZrEQDyll+9oJsyaVvY92I2Re+qK0qEJ+w5s0X3dtz+M0VAPOjP1gtU3iqWyjQ0G3nvd5CLZ2g==",
       "dev": true,
       "license": "MIT",
+      "dependencies": {
+        "eventsource-parser": "^3.0.1"
+      },
       "engines": {
-        "node": ">=12.0.0"
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/eventsource-parser": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/eventsource-parser/-/eventsource-parser-3.0.2.tgz",
+      "integrity": "sha512-6RxOBZ/cYgd8usLwsEl+EC09Au/9BcmCKYF2/xbml6DNczf7nv0MQb+7BA2F+li6//I+28VNlQR37XfQtcAJuA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18.0.0"
       }
     },
     "node_modules/execa": {
@@ -7113,18 +7126,21 @@
       "license": "MIT"
     },
     "node_modules/smee-client": {
-      "version": "2.0.4",
-      "resolved": "https://registry.npmjs.org/smee-client/-/smee-client-2.0.4.tgz",
-      "integrity": "sha512-RxXCs0mfaxpI8JF4SeTM51XtRiprzW5g20HVt4aTQ36EB+RaN0aj0m/4EbXLGdfPlqahQ09d3UnJYmALN2CbYw==",
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/smee-client/-/smee-client-4.2.1.tgz",
+      "integrity": "sha512-pwu2jawMAgXMiw/fpaDekdN7BlRVjp3QZgExtD5fHIIoqDXXkxQ1VzC77KsPay0TvdKB9EfVyq5Iea/Ona8oYA==",
       "dev": true,
       "license": "ISC",
       "dependencies": {
-        "commander": "^12.0.0",
-        "eventsource": "^2.0.2",
+        "eventsource": "^4.0.0",
+        "undici": "^7.0.0",
         "validator": "^13.11.0"
       },
       "bin": {
         "smee": "bin/smee.js"
+      },
+      "engines": {
+        "node": "^20.18 || >= 22"
       }
     },
     "node_modules/sonic-boom": {
@@ -7551,6 +7567,16 @@
         "node": ">=14.17"
       }
     },
+    "node_modules/undici": {
+      "version": "7.10.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-7.10.0.tgz",
+      "integrity": "sha512-u5otvFBOBZvmdjWLVW+5DAc9Nkq8f24g0O9oY7qw2JVIF1VocIFoyz9JFkuVOS2j41AufeO0xnlweJ2RLT8nGw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=20.18.1"
+      }
+    },
     "node_modules/undici-types": {
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
diff --git a/package.json b/package.json
index dc1148f..fede99e 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   "devDependencies": {
     "@netlify/functions": "^4.0.0",
     "nock": "^14.0.5",
-    "smee-client": "^2.0.4",
+    "smee-client": "^4.0.0",
     "uvu": "^0.5.1"
   },
   "engines": {