diff --git a/backend/package-lock.json b/backend/package-lock.json
old mode 100755
new mode 100644
index 25772db..42af0e3
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -226,9 +226,9 @@
       "dev": true
     },
     "acorn": {
-      "version": "6.1.1",
-      "resolved": "https://nexus.solutions.consensys-uk.net/repository/komgo-npm-group/acorn/-/acorn-6.1.1.tgz",
-      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
       "dev": true
     },
     "acorn-dynamic-import": {