diff --git a/package-lock.json b/package-lock.json
index cd7f3b2..aa7bae3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,11 @@
       "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-1.1.0.tgz",
       "integrity": "sha1-RSIe5Cn37h5QNb4/UVM/HN/SmIQ="
     },
+    "charset": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/charset/-/charset-1.0.1.tgz",
+      "integrity": "sha512-6dVyOOYjpfFcL1Y4qChrAoQLRHvj2ziyhcm0QJlhOcAhykL/k1kTUPbeo+87MNRTRdk2OIIsIXbuF3x2wi5EXg=="
+    },
     "colors": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/colors/-/colors-1.3.3.tgz",
@@ -33,16 +38,23 @@
       }
     },
     "ecstatic": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/ecstatic/-/ecstatic-3.3.2.tgz",
-      "integrity": "sha512-fLf9l1hnwrHI2xn9mEDT7KIi22UDqA2jaCwyCbSUJh9a1V+LEUSL/JO/6TIz/QyuBURWUHrFL5Kg2TtO1bkkog==",
+      "version": "4.1.4",
+      "resolved": "https://registry.npmjs.org/ecstatic/-/ecstatic-4.1.4.tgz",
+      "integrity": "sha512-8E4ZLK4uRuB9pwywGpy/B9vcz4gCp6IY7u4cMbeCINr/fjb1v+0wf0Ae2XlfSnG8xZYnE4uaJBjFkYI0bqcIdw==",
       "requires": {
+        "charset": "^1.0.1",
         "he": "^1.1.1",
-        "mime": "^1.6.0",
+        "mime": "^2.4.1",
         "minimist": "^1.1.0",
-        "url-join": "^2.0.5"
+        "on-finished": "^2.3.0",
+        "url-join": "^4.0.0"
       }
     },
+    "ee-first": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
+      "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
+    },
     "eventemitter3": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-3.1.2.tgz",
@@ -72,14 +84,14 @@
       }
     },
     "mime": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/mime/-/mime-1.6.0.tgz",
-      "integrity": "sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg=="
+      "version": "2.4.6",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-2.4.6.tgz",
+      "integrity": "sha512-RZKhC3EmpBchfTGBVb8fb+RL2cWyw/32lshnsETttkBAyAUXSGHxbEJWWRXc751DrIxG1q04b8QwMbAwkRPpUA=="
     },
     "minimist": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-      "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+      "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
     },
     "mkdirp": {
       "version": "0.5.1",
@@ -101,6 +113,14 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
       "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
     },
+    "on-finished": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
+      "integrity": "sha1-IPEzZIGwg811M3mSoWlxqi2QaUc=",
+      "requires": {
+        "ee-first": "1.1.1"
+      }
+    },
     "opener": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/opener/-/opener-1.5.1.tgz",
@@ -171,9 +191,9 @@
       }
     },
     "url-join": {
-      "version": "2.0.5",
-      "resolved": "https://registry.npmjs.org/url-join/-/url-join-2.0.5.tgz",
-      "integrity": "sha1-WvIvGMBSoACkjXuCxenC4v7tpyg="
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/url-join/-/url-join-4.0.1.tgz",
+      "integrity": "sha512-jk1+QP6ZJqyOiuEI9AEWQfju/nB2Pw466kbA0LEZljHwKeMgd9WrAEgEGxjPDD2+TNbbb37rTyhEfrCXfuKXnA=="
     },
     "wordwrap": {
       "version": "0.0.3",
diff --git a/package.json b/package.json
index 85b5220..0a5b572 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "basic-auth": "^1.0.3",
     "colors": "^1.3.3",
     "corser": "^2.0.1",
-    "ecstatic": "^3.3.0",
+    "ecstatic": "^4.1.4",
     "http-proxy": "^1.17.0",
     "opener": "^1.5.1",
     "optimist": "~0.6.1",