diff --git a/package-lock.json b/package-lock.json
index 8a71a0caedb8..52a8e4563d84 100644
--- a/package-lock.json
+++ b/package-lock.json
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     "strip-bom": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
       "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM="
     },
+    "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=="
+    },
     "strip-indent": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/strip-indent/-/strip-indent-2.0.0.tgz",
@@ -12162,11 +12092,6 @@
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       }
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-    "supports-color": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-      "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc="
-    },
     "svg-tags": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/svg-tags/-/svg-tags-1.0.0.tgz",
@@ -12356,19 +12281,6 @@
         }
       }
     },
-    "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=",
-      "requires": {
-        "enable": "1"
-      }
-    },
     "to-fast-properties": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-2.0.0.tgz",
@@ -12432,11 +12344,6 @@
         }
       }
     },
-    "toml": {
-      "version": "2.3.6",
-      "resolved": "https://registry.npmjs.org/toml/-/toml-2.3.6.tgz",
-      "integrity": "sha512-gVweAectJU3ebq//Ferr2JUY4WKSDe5N+z0FvjDncLGyHmIDoxgY/2Ie4qfEIDm4IS7OA6Rmdm7pdEEdMcV/xQ=="
-    },
     "trim-newlines": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/trim-newlines/-/trim-newlines-2.0.0.tgz",
@@ -12966,14 +12873,6 @@
         }
       }
     },
-    "unyield": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/unyield/-/unyield-0.0.1.tgz",
-      "integrity": "sha1-FQ5l2kK/d0JEW5WKZOubhdHSsYA=",
-      "requires": {
-        "co": "~3.1.0"
-      }
-    },
     "update-notifier": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/update-notifier/-/update-notifier-5.1.0.tgz",
@@ -13365,11 +13264,6 @@
         "string-width": "^4.0.0"
       }
     },
-    "win-fork": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/win-fork/-/win-fork-1.1.1.tgz",
-      "integrity": "sha1-j1jgZW/KAK3IyGoriePNLWotXl4="
-    },
     "word-wrap": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
diff --git a/package.json b/package.json
index 18c155fb0985..6950777d6f4a 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "junk": "^3.1.0",
     "lodash.defaultsdeep": "^4.6.1",
     "marked": "^3.0.4",
-    "metalsmith": "^2.3.0",
+    "metalsmith": "^2.5.0",
     "metalsmith-collections": "^0.9.0",
     "metalsmith-discover-helpers": "^0.1.1",
     "metalsmith-discover-partials": "^0.1.2",