diff --git a/package-lock.json b/package-lock.json
index 1211bbcc..ba3e29e6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "zwitterion",
-  "version": "0.44.2",
+  "version": "0.45.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -310,9 +310,9 @@
       }
     },
     "@types/fs-extra": {
-      "version": "8.0.1",
-      "resolved": "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-8.0.1.tgz",
-      "integrity": "sha512-J00cVDALmi/hJOYsunyT52Hva5TnJeKP5yd1r+mH/ZU0mbYZflR0Z5kw5kITtKTRYMhm1JMClOFYdHnQszEvqw==",
+      "version": "9.0.4",
+      "resolved": "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-9.0.4.tgz",
+      "integrity": "sha512-50GO5ez44lxK5MDH90DYHFFfqxH7+fTqEEnvguQRzJ/tY9qFrMSHLiYHite+F3SNmf7+LHC1eMXojuD+E3Qcyg==",
       "dev": true,
       "requires": {
         "@types/node": "*"
@@ -384,6 +384,11 @@
         "long": "^4.0.0"
       }
     },
+    "at-least-node": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/at-least-node/-/at-least-node-1.0.0.tgz",
+      "integrity": "sha512-+q/t7Ekv1EDY2l6Gda6LLiX14rU9TV20Wa3ofeQmwPFZbOMo9DXrLbOjFaaclkXKWidIaopwAObQDqwWtGUjqg=="
+    },
     "babel-plugin-syntax-export-extensions": {
       "version": "6.13.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-syntax-export-extensions/-/babel-plugin-syntax-export-extensions-6.13.0.tgz",
@@ -505,13 +510,14 @@
       }
     },
     "fs-extra": {
-      "version": "8.1.0",
-      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
-      "integrity": "sha512-yhlQgA6mnOJUKOsRUFsgJdQCvkKhcz8tlZG5HBQfReYZy46OwLcY+Zia0mtdHsOo9y/hP+CxMN0TU9QxoOtG4g==",
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-9.0.1.tgz",
+      "integrity": "sha512-h2iAoN838FqAFJY2/qVpzFXy+EBxfVE220PalAqQLDVsFOHLJrZvut5puAbCdNv6WJk+B8ihI+k0c7JK5erwqQ==",
       "requires": {
+        "at-least-node": "^1.0.0",
         "graceful-fs": "^4.2.0",
-        "jsonfile": "^4.0.0",
-        "universalify": "^0.1.0"
+        "jsonfile": "^6.0.1",
+        "universalify": "^1.0.0"
       }
     },
     "fsevents": {
@@ -539,9 +545,9 @@
       "integrity": "sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA=="
     },
     "graceful-fs": {
-      "version": "4.2.2",
-      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.2.tgz",
-      "integrity": "sha512-IItsdsea19BoLC7ELy13q1iJFNmd7ofZH5+X/pJr90/nRoPEX0DJo1dHDbgtYWOhJhcCgMDTOw84RZ72q6lB+Q=="
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
+      "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw=="
     },
     "has-flag": {
       "version": "3.0.0",
@@ -598,11 +604,19 @@
       }
     },
     "jsonfile": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-      "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.1.0.tgz",
+      "integrity": "sha512-5dgndWOriYSm5cnYaJNhalLNDKOqFwyDB/rr1E9ZsGciGvKPs8R2xYGCacuf3z6K1YKDz182fd+fY3cn3pMqXQ==",
       "requires": {
-        "graceful-fs": "^4.1.6"
+        "graceful-fs": "^4.1.6",
+        "universalify": "^2.0.0"
+      },
+      "dependencies": {
+        "universalify": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+          "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ=="
+        }
       }
     },
     "lodash": {
@@ -775,9 +789,9 @@
       "integrity": "sha512-/P5lkRXkWHNAbcJIiHPfRoKqyd7bsyCma1hZNUGfn20qm64T6ZBlrzprymeu918H+mB/0rIg2gGK/BXkhhYgBw=="
     },
     "universalify": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
-      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-1.0.0.tgz",
+      "integrity": "sha512-rb6X1W158d7pRQBg5gkR8uPaSfiids68LTJQYOtEUhoJUWBdaQHsuT/EUduxXYxcrt4r5PJ4fuHW1MHT6p0qug=="
     },
     "utf8-byte-length": {
       "version": "1.0.4",
diff --git a/package.json b/package.json
index c837e263..968ae095 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "babel-plugin-syntax-export-extensions": "6.13.0",
     "chokidar": "3.3.1",
     "commander": "4.1.0",
-    "fs-extra": "8.1.0",
+    "fs-extra": "9.0.1",
     "is-windows": "1.0.2",
     "mime": "2.4.4",
     "sanitize-filename": "1.6.3",
@@ -42,7 +42,7 @@
   },
   "devDependencies": {
     "@types/babel__core": "7.1.3",
-    "@types/fs-extra": "8.0.1",
+    "@types/fs-extra": "9.0.4",
     "@types/mime": "2.0.1",
     "@types/node": "12.12.25",
     "@types/uuid": "3.4.6",