diff --git a/blockly/package-lock.json b/blockly/package-lock.json
index 81cf5487..a64f12d0 100644
--- a/blockly/package-lock.json
+++ b/blockly/package-lock.json
@@ -30,9 +30,9 @@
       "integrity": "sha512-1zSbbCuoIjafKZ3mblY5ikvAb0ODUbqBnFuUb7f6uLeQhhGJ0vEV4ntmtxKLT2WgXCO94E07BjunsIw1jOMPZw=="
     },
     "acorn": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
-      "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA=="
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA=="
     },
     "acorn-globals": {
       "version": "4.3.4",