diff --git a/package-lock.json b/package-lock.json
index 4bb1419..883fd59 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "node-flint",
-  "version": "4.8.0",
+  "version": "4.8.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -1333,9 +1333,9 @@
       "optional": true
     },
     "deep-extend": {
-      "version": "0.5.0",
-      "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.5.0.tgz",
-      "integrity": "sha1-bvSgmwX5iw41jW2T1Mo8rsZnKAM=",
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.5.1.tgz",
+      "integrity": "sha512-N8vBdOa+DF7zkRrDCsaOXoCs/E2fJfx9B9MrKnnSiHNh4ws7eSys6YQE4KvT1cecKmOASYQBhbKjeuDD9lT81w==",
       "dev": true
     },
     "define-properties": {