diff --git a/package-lock.json b/package-lock.json
index 8818f94..d90186b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,18 +5,18 @@
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@@ -81,15 +63,10 @@
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@@ -111,115 +88,37 @@
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@@ -307,28 +186,24 @@
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@@ -355,61 +230,50 @@
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@@ -419,12 +283,17 @@
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@@ -470,10 +339,15 @@
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-        "base64-url": "1.2.1",
-        "native-or-bluebird": "1.1.2"
-      }
+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
     },
     "util-deprecate": {
       "version": "1.0.2",
@@ -1152,19 +916,14 @@
       "dev": true
     },
     "utils-merge": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.0.tgz",
-      "integrity": "sha1-ApT7kiu5N1FTVBxPcJYjHyh8ivg="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
     },
     "vary": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/vary/-/vary-0.1.0.tgz",
-      "integrity": "sha1-3wlFiZ6TwMxb0YzIMh2dIedPYXY="
-    },
-    "vhost": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/vhost/-/vhost-2.0.0.tgz",
-      "integrity": "sha1-HiZ3C9D86GxAlFWR5vKExokXkeI="
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
     },
     "wrappy": {
       "version": "1.0.2",
diff --git a/package.json b/package.json
index e23e9a3..c1f1f66 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   "author": "Michael Aufreiter",
   "contributors": [],
   "dependencies": {
-    "express": "~3.16.0"
+    "express": "~4.16.2"
   },
   "engines": {
     "node": "~6.11.1"