diff --git a/package-lock.json b/package-lock.json
index fb85b2c..e4d847d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
     "name": "nat-traversal",
-    "version": "0.1.0",
+    "version": "0.2.18",
     "lockfileVersion": 1,
     "requires": true,
     "dependencies": {
@@ -196,6 +196,11 @@
             "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
             "dev": true
         },
+        "charenc": {
+            "version": "0.0.2",
+            "resolved": "https://registry.npmjs.org/charenc/-/charenc-0.0.2.tgz",
+            "integrity": "sha512-yrLQ/yVUFXkzg7EDQsPieE/53+0RlaWTs+wBrvW36cyilJ2SaDWfl4Yj7MtLTXleV9uEKefbAGUPv2/iWSooRA=="
+        },
         "circular-json": {
             "version": "0.3.3",
             "resolved": "https://registry.npmjs.org/circular-json/-/circular-json-0.3.3.tgz",
@@ -272,6 +277,11 @@
                 "which": "1.3.0"
             }
         },
+        "crypt": {
+            "version": "0.0.2",
+            "resolved": "https://registry.npmjs.org/crypt/-/crypt-0.0.2.tgz",
+            "integrity": "sha512-mCxBlsHFYh9C+HVpiEacem8FEBnMXgU9gy4zmNC+SXAZNB/1idgp/aulFJ4FgCi7GPEVbfyng092GqL2k2rmow=="
+        },
         "debug": {
             "version": "3.1.0",
             "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
@@ -311,6 +321,11 @@
                 "esutils": "2.0.2"
             }
         },
+        "es6-promisify": {
+            "version": "7.0.0",
+            "resolved": "https://registry.npmjs.org/es6-promisify/-/es6-promisify-7.0.0.tgz",
+            "integrity": "sha512-ginqzK3J90Rd4/Yz7qRrqUeIpe3TwSXTPPZtPne7tGBPeAaQiU8qt4fpKApnxHcq1AwtUdHVg5P77x/yrggG8Q=="
+        },
         "escape-string-regexp": {
             "version": "1.0.5",
             "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
@@ -641,6 +656,11 @@
                 "through": "2.3.8"
             }
         },
+        "is-buffer": {
+            "version": "1.1.6",
+            "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz",
+            "integrity": "sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w=="
+        },
         "is-fullwidth-code-point": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
@@ -692,8 +712,7 @@
         "isexe": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
-            "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=",
-            "dev": true
+            "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA="
         },
         "js-tokens": {
             "version": "3.0.2",
@@ -749,6 +768,16 @@
                 "yallist": "2.1.2"
             }
         },
+        "md5": {
+            "version": "2.3.0",
+            "resolved": "https://registry.npmjs.org/md5/-/md5-2.3.0.tgz",
+            "integrity": "sha512-T1GITYmFaKuO91vxyoQMFETst+O71VUPEU3ze5GNzDm0OWdP8v1ziTaAEPUr/3kLsY3Sftgz242A1SetQiDL7g==",
+            "requires": {
+                "charenc": "0.0.2",
+                "crypt": "0.0.2",
+                "is-buffer": "~1.1.6"
+            }
+        },
         "mimic-fn": {
             "version": "1.2.0",
             "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-1.2.0.tgz",
@@ -862,8 +891,7 @@
         "os-tmpdir": {
             "version": "1.0.2",
             "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
-            "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=",
-            "dev": true
+            "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ="
         },
         "path-is-absolute": {
             "version": "1.0.1",
@@ -877,6 +905,27 @@
             "integrity": "sha1-NlQX3t5EQw0cEa9hAn+s8HS9/FM=",
             "dev": true
         },
+        "pem": {
+            "version": "1.14.8",
+            "resolved": "https://registry.npmjs.org/pem/-/pem-1.14.8.tgz",
+            "integrity": "sha512-ZpbOf4dj9/fQg5tQzTqv4jSKJQsK7tPl0pm4/pvPcZVjZcJg7TMfr3PBk6gJH97lnpJDu4e4v8UUqEz5daipCg==",
+            "requires": {
+                "es6-promisify": "^7.0.0",
+                "md5": "^2.3.0",
+                "os-tmpdir": "^1.0.2",
+                "which": "^2.0.2"
+            },
+            "dependencies": {
+                "which": {
+                    "version": "2.0.2",
+                    "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+                    "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+                    "requires": {
+                        "isexe": "^2.0.0"
+                    }
+                }
+            }
+        },
         "pify": {
             "version": "2.3.0",
             "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
diff --git a/yarn.lock b/yarn.lock
index e865fe6..23e9e63 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -730,8 +730,8 @@ safe-regex@^1.1.0:
     ret "~0.1.10"
 
 semver@^5.3.0:
-  version "5.5.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
+  version "5.7.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.2.tgz#48d55db737c3287cd4835e17fa13feace1c41ef8"
 
 shebang-command@^1.2.0:
   version "1.2.0"