diff --git a/package-lock.json b/package-lock.json
index c4f8e9e..a5e4058 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -965,9 +965,9 @@
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-          "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.0.0.tgz",
-          "integrity": "sha512-7Bv1We7ZGuU79zZbb6rRqcpxo3OY+zrdtloZWoyD8fmGX+FeXRjE+iuGkZjSXLVovLzrsvMGMy0EkwA0E0umxg==",
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.1.1.tgz",
+          "integrity": "sha512-wdlPY2tm/9XBr7QkKlq0WQVgiuGTX6YWPyRyBviSoScBuLfTVQhvwg6wJ369GJ/1nPfTLMfnrFIfjqVg6d+jQQ==",
           "dev": true
         }
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@@ -1968,9 +1968,9 @@
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-      "resolved": "https://registry.npmjs.org/browserify/-/browserify-16.5.0.tgz",
-      "integrity": "sha512-6bfI3cl76YLAnCZ75AGu/XPOsqUhRyc0F/olGIJeCxtfxF2HvPKEcmjU9M8oAPxl4uBY1U7Nry33Q6koV3f2iw==",
+      "version": "16.5.1",
+      "resolved": "https://registry.npmjs.org/browserify/-/browserify-16.5.1.tgz",
+      "integrity": "sha512-EQX0h59Pp+0GtSRb5rL6OTfrttlzv+uyaUVlK6GX3w11SQ0jKPKyjC/54RhPR2ib2KmfcELM06e8FxcI5XNU2A==",
       "dev": true,
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@@ -1978,7 +1978,7 @@
         "browser-pack": "^6.0.1",
         "browser-resolve": "^1.11.0",
         "browserify-zlib": "~0.2.0",
-        "buffer": "^5.0.2",
+        "buffer": "~5.2.1",
         "cached-path-relative": "^1.0.0",
         "concat-stream": "^1.6.0",
         "console-browserify": "^1.1.0",
@@ -1996,7 +1996,7 @@
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         "insert-module-globals": "^7.0.0",
         "labeled-stream-splicer": "^2.0.0",
-        "mkdirp": "^0.5.0",
+        "mkdirp-classic": "^0.5.2",
         "module-deps": "^6.0.0",
         "os-browserify": "~0.3.0",
         "parents": "^1.0.1",
@@ -2128,9 +2128,9 @@
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-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.4.3.tgz",
-      "integrity": "sha512-zvj65TkFeIt3i6aj5bIvJDzjjQQGs4o/sNoezg1F1kYap9Nu2jcUdpwzRSJTHMMzG0H7bZkn4rNQpImhuxWX2A==",
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.2.1.tgz",
+      "integrity": "sha512-c+Ko0loDaFfuPWiL02ls9Xd3GO3cPVmUobQ6t3rXNUk304u6hGq+8N/kFi+QEIKhzK3uwolVhLzszmfLmMLnqg==",
       "dev": true,
       "requires": {
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@@ -8514,6 +8514,12 @@
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+    "mkdirp-classic": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.2.tgz",
+      "integrity": "sha512-ejdnDQcR75gwknmMw/tx02AuRs8jCtqFoFqDZMjiNxsu85sRIJVXDKHuLYvUUPRBUtV2FpSZa9bL1BUa3BdR2g==",
+      "dev": true
+    },
     "module-deps": {
       "version": "6.2.2",
       "resolved": "https://registry.npmjs.org/module-deps/-/module-deps-6.2.2.tgz",
@@ -9081,9 +9087,9 @@
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     "pako": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.10.tgz",
-      "integrity": "sha512-0DTvPVU3ed8+HNXOu5Bs+o//Mbdj9VNQMUOe9oKCwh8l0GNwpTDMKCWbRjgtD291AWnkAgkqA/LOnQS8AmS1tw==",
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
+      "integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw==",
       "dev": true
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@@ -10820,9 +10826,9 @@
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-          "version": "3.5.0",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.5.0.tgz",
-          "integrity": "sha512-gSz026xs2LfxBPudDuI41V1lka8cxg64E66SGe78zJlsUofOg/yqwezdIcdfwik6B4h8LFmWPA9ef9X3FiNFLA==",
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+          "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
           "dev": true,
           "requires": {
             "inherits": "^2.0.3",
diff --git a/package.json b/package.json
index 8da062d..d419f02 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "zlib": "^1.0.5"
   },
   "devDependencies": {
-    "browserify": "^16.5.0",
+    "browserify": "^16.5.1",
     "coveralls": "^3.0.9",
     "istanbul": "^1.1.0-alpha.1",
     "jest": "^24.9.0",