diff --git a/package-lock.json b/package-lock.json
index f4635ab..2ecd118 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -64,15 +64,33 @@
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-      "integrity": "sha1-rDYTsdqb7RtHUQu0ZRuJMeRxRsc="
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+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
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       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
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+      "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-2.0.1.tgz",
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@@ -87,6 +105,15 @@
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-      "resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
-      "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs="
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+      "requires": {
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+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
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@@ -219,9 +243,9 @@
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-      "integrity": "sha1-HIaZHYFq0eUEdQ5zh0Ik7PO+xQg="
+      "version": "4.0.7",
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@@ -236,6 +260,11 @@
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@@ -258,6 +287,21 @@
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+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
+      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A=="
+    },
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+      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.1.3.tgz",
+      "integrity": "sha512-QJVz1Tj7MS099PevUG5jvnt9tSkXN8K14dxQlikJuPt4uD9hHAHjLyLBiLR5zELelBdD9QNRAXZzsJx0WaDL9A==",
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+        "has": "^1.0.3",
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@@ -297,6 +341,14 @@
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@@ -305,38 +357,97 @@
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-      "integrity": "sha1-LAX/rvkLaOhg8/0rVO9YCYknfuI="
+      "version": "1.2.0",
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-        "portfinder": "0.4.0",
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@@ -546,23 +657,16 @@
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-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
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-          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
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@@ -586,6 +690,11 @@
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@@ -595,25 +704,9 @@
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@@ -621,12 +714,28 @@
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-      "integrity": "sha1-o/+t/6/k+5jgYBqF7aJ8J86Eyh4=",
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-        "mkdirp": "0.5.1"
+        "async": "^2.6.4",
+        "debug": "^3.2.7",
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+        }
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@@ -638,9 +747,12 @@
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-      "integrity": "sha1-6eha2+ddoLvkyOBHaghikPhjtAQ="
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@@ -671,7 +783,7 @@
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+      "integrity": "sha512-KigOCHcocU3XODJxsu8i/j8T9tzT4adHiecwORRQ0ZZFcp7ahwXuRU1m+yuO90C5ZUyGeGfocHDI14M3L3yDAQ=="
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     "rimraf": {
       "version": "2.6.2",
@@ -681,12 +793,37 @@
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       }
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+    "safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+    },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+    },
+    "secure-compare": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/secure-compare/-/secure-compare-3.0.1.tgz",
+      "integrity": "sha512-AckIIV90rPDcBcglUwXPF3kg0P0qmPsPXAj6BBEENQE1p5yA1xfmDJzfi1Tappj37Pv2mVbKpL3Z1T+Nn7k1Qw=="
+    },
     "select": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/select/-/select-1.1.2.tgz",
       "integrity": "sha1-DnNQrN7ICxEIUoeG7B1EGNEbOW0=",
       "optional": true
     },
+    "side-channel": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.4.tgz",
+      "integrity": "sha512-q5XPytqFEIKHkGdiMIrY10mvLRvnQh42/+GoBlFW3b2LXLE2xxJpZFdm94we0BaoV3RwJyGqg5wS7epxTv0Zvw==",
+      "requires": {
+        "call-bind": "^1.0.0",
+        "get-intrinsic": "^1.0.2",
+        "object-inspect": "^1.9.0"
+      }
+    },
     "sigmund": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
@@ -749,11 +886,11 @@
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     "union": {
-      "version": "0.4.6",
-      "resolved": "https://registry.npmjs.org/union/-/union-0.4.6.tgz",
-      "integrity": "sha1-GY+9rrolTniLDvy2MLwR8kopWeA=",
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/union/-/union-0.5.0.tgz",
+      "integrity": "sha512-N6uOhuW6zO95P3Mel2I2zMsbsanvvtgn6jVqJv4vbVcz/JN0OkL9suomjQGmWtxJQXOCqUJvquc1sMeNz/IwlA==",
       "requires": {
-        "qs": "2.3.3"
+        "qs": "^6.4.0"
       }
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@@ -770,9 +907,9 @@
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-      "resolved": "https://registry.npmjs.org/url-join/-/url-join-0.0.1.tgz",
-      "integrity": "sha1-HbSK1CLTQCRpqH99l73r/k+x48g="
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/url-join/-/url-join-4.0.1.tgz",
+      "integrity": "sha512-jk1+QP6ZJqyOiuEI9AEWQfju/nB2Pw466kbA0LEZljHwKeMgd9WrAEgEGxjPDD2+TNbbb37rTyhEfrCXfuKXnA=="
     },
     "ware": {
       "version": "1.3.0",
@@ -782,16 +919,19 @@
         "wrap-fn": "0.1.5"
       }
     },
+    "whatwg-encoding": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-2.0.0.tgz",
+      "integrity": "sha512-p41ogyeMUrw3jWclHWTQg1k05DSVXPLcVxRTYsXUk+ZooOCZLcoYgPZ/HL/D/N+uQPOtcp1me1WhBEaX02mhWg==",
+      "requires": {
+        "iconv-lite": "0.6.3"
+      }
+    },
     "win-fork": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/win-fork/-/win-fork-1.1.1.tgz",
       "integrity": "sha1-j1jgZW/KAK3IyGoriePNLWotXl4="
     },
-    "wordwrap": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc="
-    },
     "wrap-fn": {
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       "resolved": "https://registry.npmjs.org/wrap-fn/-/wrap-fn-0.1.5.tgz",
diff --git a/package.json b/package.json
index 2be828a..722ee71 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "dependencies": {
     "ejs": "^2.3.4",
     "katex": "^0.5.1",
-    "http-server": "^0.8.5",
+    "http-server": "^14.1.1",
     "lodash": "^3.10.1",
     "metalsmith": "^2.1.0",
     "metalsmith-collections": "^0.7.0",