diff --git a/package-lock.json b/package-lock.json
index fa22fe76aa2d..ab0054faf130 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -161,7 +161,7 @@
         "eslint-plugin-prettier": "^5.5.5",
         "eslint-plugin-primer-react": "^9.0.0",
         "globals": "^17.3.0",
-        "gpt-tokenizer": "^3.4.0",
+        "gpt-tokenizer": "^4.0.0",
         "graphql": "^16.12.0",
         "http-status-code": "^2.1.0",
         "husky": "^9.1.7",
@@ -8982,9 +8982,9 @@
       }
     },
     "node_modules/gpt-tokenizer": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/gpt-tokenizer/-/gpt-tokenizer-3.4.0.tgz",
-      "integrity": "sha512-wxFLnhIXTDjYebd9A9pGl3e31ZpSypbpIJSOswbgop5jLte/AsZVDvjlbEuVFlsqZixVKqbcoNmRlFDf6pz/UQ==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/gpt-tokenizer/-/gpt-tokenizer-4.0.0.tgz",
+      "integrity": "sha512-YAWIyzvuVUHEfW7tFfFAxH8qQb+Q3RU9nYOTy7skMNX5qzU6Q8jxTHZLyO56ug1vYvCR7wndzpd3jwD86/mhjQ==",
       "dev": true,
       "license": "MIT"
     },
diff --git a/package.json b/package.json
index 5aa05ce4d1ad..cb006345ef85 100644
--- a/package.json
+++ b/package.json
@@ -324,7 +324,7 @@
     "eslint-plugin-prettier": "^5.5.5",
     "eslint-plugin-primer-react": "^9.0.0",
     "globals": "^17.3.0",
-    "gpt-tokenizer": "^3.4.0",
+    "gpt-tokenizer": "^4.0.0",
     "graphql": "^16.12.0",
     "http-status-code": "^2.1.0",
     "husky": "^9.1.7",