diff --git a/package-lock.json b/package-lock.json
index 9ba0395..5d5ca7c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "dependencies": {
         "@stencila/logga": "^4.0.0",
         "acorn": "^8.4.0",
-        "acorn-walk": "^8.1.0",
+        "acorn-walk": "^8.3.3",
         "ajv": "^8.6.0",
         "ajv-formats": "^2.1.0",
         "content-type": "^1.0.4",
@@ -2399,9 +2399,9 @@
       "dev": true
     },
     "node_modules/acorn": {
-      "version": "8.4.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.4.1.tgz",
-      "integrity": "sha512-asabaBSkEKosYKMITunzX177CXxQ4Q8BSSzMTKD+FefUhipQC70gfW5SiUDhYQ3vk8G+81HqQk7Fv9OXwwn9KA==",
+      "version": "8.12.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.0.tgz",
+      "integrity": "sha512-RTvkC4w+KNXrM39/lWCUaG0IbRkWdCv7W/IOW9oU6SawyxulvkQy5HQPVTKxEjczcUvapcrw3cFx/60VN/NRNw==",
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -2410,9 +2410,12 @@
       }
     },
     "node_modules/acorn-walk": {
-      "version": "8.1.1",
-      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.1.1.tgz",
-      "integrity": "sha512-FbJdceMlPHEAWJOILDk1fXD8lnTlEIWFkqtfk+MvmL5q/qlHfN7GEHcsFZWt/Tea9jRNPWUZG4G976nqAAmU9w==",
+      "version": "8.3.3",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.3.3.tgz",
+      "integrity": "sha512-MxXdReSRhGO7VlFe1bRG/oI7/mdLV9B9JJT0N8vZOhF7gFRR5l3M8W9G8JxmKV+JC5mGqJ0QvqfSOLsCPa4nUw==",
+      "dependencies": {
+        "acorn": "^8.11.0"
+      },
       "engines": {
         "node": ">=0.4.0"
       }
@@ -13619,14 +13622,17 @@
       "dev": true
     },
     "acorn": {
-      "version": "8.4.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.4.1.tgz",
-      "integrity": "sha512-asabaBSkEKosYKMITunzX177CXxQ4Q8BSSzMTKD+FefUhipQC70gfW5SiUDhYQ3vk8G+81HqQk7Fv9OXwwn9KA=="
+      "version": "8.12.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.0.tgz",
+      "integrity": "sha512-RTvkC4w+KNXrM39/lWCUaG0IbRkWdCv7W/IOW9oU6SawyxulvkQy5HQPVTKxEjczcUvapcrw3cFx/60VN/NRNw=="
     },
     "acorn-walk": {
-      "version": "8.1.1",
-      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.1.1.tgz",
-      "integrity": "sha512-FbJdceMlPHEAWJOILDk1fXD8lnTlEIWFkqtfk+MvmL5q/qlHfN7GEHcsFZWt/Tea9jRNPWUZG4G976nqAAmU9w=="
+      "version": "8.3.3",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.3.3.tgz",
+      "integrity": "sha512-MxXdReSRhGO7VlFe1bRG/oI7/mdLV9B9JJT0N8vZOhF7gFRR5l3M8W9G8JxmKV+JC5mGqJ0QvqfSOLsCPa4nUw==",
+      "requires": {
+        "acorn": "^8.11.0"
+      }
     },
     "agent-base": {
       "version": "6.0.2",
diff --git a/package.json b/package.json
index d9724bc..3d77aa3 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
   "dependencies": {
     "@stencila/logga": "^4.0.0",
     "acorn": "^8.4.0",
-    "acorn-walk": "^8.1.0",
+    "acorn-walk": "^8.3.3",
     "ajv": "^8.6.0",
     "ajv-formats": "^2.1.0",
     "content-type": "^1.0.4",