diff --git a/package.json b/package.json
index 17f508a..6b82f4b 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   "pre-commit": "validate:openapi",
   "dependencies": {
     "@terraformer/wkt": "^2.2.1",
-    "acorn": "^6.4.2",
+    "acorn": "^8.15.0",
     "apicache": "^1.6.2",
     "axios": "^1.12.0",
     "big-json": "^3.2.0",
diff --git a/yarn.lock b/yarn.lock
index ec5eb4b..b89cd03 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -218,12 +218,7 @@ acorn@^2.1.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-2.7.0.tgz#ab6e7d9d886aaca8b085bc3312b79a198433f0e7"
   integrity sha512-pXK8ez/pVjqFdAgBkF1YPVRacuLQ9EXBKaKWaeh58WNfMkCmZhOZzu+NtKSPD5PHmCCHheQ5cD29qM1K4QTxIg==
 
-acorn@^6.4.2:
-  version "6.4.2"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.2.tgz#35866fd710528e92de10cf06016498e47e39e1e6"
-  integrity sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==
-
-acorn@^8.9.0:
+acorn@^8.15.0, acorn@^8.9.0:
   version "8.15.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.15.0.tgz#a360898bc415edaac46c8241f6383975b930b816"
   integrity sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==