diff --git a/package-lock.json b/package-lock.json
index 28a9390..14fc59a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -195,17 +195,17 @@
         "buffer": {
           "version": "4.9.1",
           "resolved": "https://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
-          "integrity": "sha1-bRu2AbB6TvztlwlBMgkwJ8lbwpg=",
+          "integrity": "sha512-DNK4ruAqtyHaN8Zne7PkBTO+dD1Lr0YfTduMqlIyjvQIoztBkUxrvL+hKeLW8NXFKHOq/2upkxuoS9znQ9bW9A==",
           "requires": {
-            "base64-js": "1.3.0",
-            "ieee754": "1.1.8",
-            "isarray": "1.0.0"
+            "base64-js": "^1.0.2",
+            "ieee754": "^1.1.4",
+            "isarray": "^1.0.0"
           }
         },
         "ieee754": {
           "version": "1.1.8",
           "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.1.8.tgz",
-          "integrity": "sha1-vjPUCsEO8ZJnAfbwii2G+/0a0+Q="
+          "integrity": "sha512-/aoyv2Nt7mGLnCAWzE0C1WH9Xd8ZsqR0f4Pjwxputi1JNm01+InyAYQotF4N+ulEIjbEsJo22NOHr+U/XEZ1Pw=="
         },
         "uuid": {
           "version": "3.3.2",