diff --git a/package-lock.json b/package-lock.json
index f42274b..1ea3763 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,34 +4,6 @@
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@@ -107,43 +75,12 @@
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-      "integrity": "sha1-KFo/cRVokGUGTWv570Vy22ZpXL8="
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@@ -158,6 +95,16 @@
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-      "integrity": "sha1-muH92UiXeY7at20JGM9C0MMYT6k=",
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+      "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
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@@ -260,21 +203,31 @@
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+      "resolved": "https://registry.npmjs.org/gray-matter/-/gray-matter-4.0.3.tgz",
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-        "extend-shallow": "^2.0.1",
-        "js-yaml": "^3.8.1",
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@@ -289,19 +242,6 @@
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@@ -318,16 +258,16 @@
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@@ -337,13 +277,23 @@
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@@ -577,26 +524,39 @@
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-      "integrity": "sha1-gzr7taKmOF4tmuPZNeOeM+rqUjE=",
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-        "is": "^3.1.0",
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+        }
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     },
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@@ -841,6 +801,15 @@
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+      "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.5.tgz",
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@@ -891,7 +860,17 @@
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+      "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
+      "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q=="
+    },
+    "picomatch": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA=="
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@@ -901,32 +880,36 @@
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-    "recursive-readdir": {
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-      "resolved": "https://registry.npmjs.org/recursive-readdir/-/recursive-readdir-2.2.1.tgz",
-      "integrity": "sha1-kO8jHQd4xc4JPJpI105cVCLROpk=",
+    "rimraf": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
+      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
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-        "minimatch": {
-          "version": "3.0.3",
-          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.3.tgz",
-          "integrity": "sha1-Kk5AkLlrLbBqnX3wEFWmKnfJt3Q=",
-          "requires": {
-            "brace-expansion": "^1.0.0"
-          }
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+        "glob": "^7.1.3"
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-    "rimraf": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.1.tgz",
-      "integrity": "sha1-wjOOxkPfeht/5cVPqG9XQopV8z0=",
+    "section-matter": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/section-matter/-/section-matter-1.0.0.tgz",
+      "integrity": "sha512-vfD3pmTzGpufjScBh50YHKzEu2lxBWhVEHsNGoEXmCmn2hKGfeNLYMzCJpe8cD7gqX7TJluOVpBkAequ6dgMmA==",
+      "requires": {
+        "extend-shallow": "^2.0.1",
+        "kind-of": "^6.0.0"
+      }
+    },
+    "shebang-command": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+      "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
       "requires": {
-        "glob": "^7.0.5"
+        "shebang-regex": "^3.0.0"
       }
     },
+    "shebang-regex": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
+      "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A=="
+    },
     "sigmund": {
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       "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
@@ -966,41 +949,23 @@
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-      "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
-      "requires": {
-        "ansi-regex": "^2.0.0"
-      }
+    "strip-bom-string": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom-string/-/strip-bom-string-1.0.0.tgz",
+      "integrity": "sha512-uCC2VHvQRYu+lMh4My/sFNmF2klFymLX1wHJeXnbEJERpV/ZsVuonzerjfrGpIGF7LBVa1O7i9kjiWvJiFck8g=="
     },
     "substitute": {
       "version": "https://github.com/segmentio/substitute/archive/0.0.1.tar.gz",
       "integrity": "sha1-QyhmmFsDw7DT9xrGPRrhoY369H0="
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-    "supports-color": {
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-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-      "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc="
-    },
-    "thunkify": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/thunkify/-/thunkify-2.1.2.tgz",
-      "integrity": "sha1-+qDp0jDFGsyVyhOjYawFyn4EVT0="
-    },
-    "thunkify-wrap": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/thunkify-wrap/-/thunkify-wrap-1.0.4.tgz",
-      "integrity": "sha1-tSvlSN3+/aIOALWMYJZ2K0PdaIA=",
+    "to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
       "requires": {
-        "enable": "1"
+        "is-number": "^7.0.0"
       }
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-    "toml": {
-      "version": "2.3.2",
-      "resolved": "https://registry.npmjs.org/toml/-/toml-2.3.2.tgz",
-      "integrity": "sha1-Xt7VykKIeSSUn9BusOlVZWAB6DQ="
-    },
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       "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.12.8.tgz",
@@ -1017,14 +982,6 @@
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       "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8="
     },
-    "unyield": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/unyield/-/unyield-0.0.1.tgz",
-      "integrity": "sha1-FQ5l2kK/d0JEW5WKZOubhdHSsYA=",
-      "requires": {
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       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/url-join/-/url-join-1.1.0.tgz",
@@ -1038,10 +995,13 @@
         "wrap-fn": "^0.1.0"
       }
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-    "win-fork": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/win-fork/-/win-fork-1.1.1.tgz",
-      "integrity": "sha1-j1jgZW/KAK3IyGoriePNLWotXl4="
+    "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"
+      }
     },
     "wordwrap": {
       "version": "1.0.0",
diff --git a/package.json b/package.json
index e77ac10..05fcf26 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "highlighter": "0.0.3",
     "jsonfile": "^2.3.1",
     "lodash": "^4.17.5",
-    "metalsmith": "^2.1.0",
+    "metalsmith": "^2.5.0",
     "metalsmith-assets": "^0.1.0",
     "metalsmith-collections": "^0.9.0",
     "metalsmith-copy": "^0.2.1",