diff --git a/package-lock.json b/package-lock.json
index c750199bfe3..3e66ccd5a29 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -289,9 +289,10 @@
       }
     },
     "acorn": {
-      "version": "7.1.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
-      "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg=="
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
+      "dev": true
     },
     "acorn-dynamic-import": {
       "version": "4.0.0",
@@ -306,6 +307,14 @@
       "requires": {
         "acorn": "^7.1.1",
         "acorn-walk": "^7.1.1"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+          "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
+          "dev": true
+        }
       }
     },
     "acorn-jsx": {
@@ -322,6 +331,14 @@
         "acorn": "^7.0.0",
         "acorn-walk": "^7.0.0",
         "xtend": "^4.0.2"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+          "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
+          "dev": true
+        }
       }
     },
     "acorn-walk": {
@@ -2825,6 +2842,12 @@
         "yargs": "^6.5.0"
       },
       "dependencies": {
+        "acorn": {
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+          "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
+          "dev": true
+        },
         "camelcase": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
@@ -3711,6 +3734,14 @@
         "acorn": "^7.1.1",
         "acorn-jsx": "^5.2.0",
         "eslint-visitor-keys": "^1.1.0"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+          "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
+          "dev": true
+        }
       }
     },
     "esprima": {
@@ -3987,6 +4018,11 @@
         "object-keys": "^1.0.6"
       },
       "dependencies": {
+        "acorn": {
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+          "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg=="
+        },
         "isarray": {
           "version": "2.0.5",
           "resolved": "https://registry.npmjs.org/isarray/-/isarray-2.0.5.tgz",
@@ -6243,6 +6279,14 @@
         "whatwg-url": "^8.0.0",
         "ws": "^7.2.3",
         "xml-name-validator": "^3.0.0"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+          "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
+          "dev": true
+        }
       }
     },
     "jsesc": {
diff --git a/package.json b/package.json
index 3b390078bf6..0a0c8387013 100644
--- a/package.json
+++ b/package.json
@@ -123,7 +123,7 @@
     "world-calendars": "^1.0.3"
   },
   "devDependencies": {
-    "acorn": "^7.1.1",
+    "acorn": "^6.4.1",
     "brfs": "^2.0.2",
     "browserify": "^16.5.1",
     "browserify-transform-tools": "^1.7.0",