diff --git a/package-lock.json b/package-lock.json
index 1690cd1..a608ee6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -860,6 +860,7 @@
       "version": "2.10.1",
       "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz",
       "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
+      "optional": true,
       "requires": {
         "hoek": "2.x.x"
       }
@@ -2563,7 +2564,8 @@
     "hoek": {
       "version": "2.16.3",
       "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz",
-      "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0="
+      "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0=",
+      "optional": true
     },
     "home-or-tmp": {
       "version": "2.0.0",
@@ -2740,6 +2742,11 @@
         }
       }
     },
+    "interpret": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/interpret/-/interpret-1.4.0.tgz",
+      "integrity": "sha512-agE4QfB2Lkp9uICn7BAqoscw4SZP9kTE2hxiFI3jBPmXJfdqiahTbUuKGsMoN2GtqL9AxhYioAcVvgsb1HvRbA=="
+    },
     "invariant": {
       "version": "2.2.4",
       "resolved": "https://registry.npmjs.org/invariant/-/invariant-2.2.4.tgz",
@@ -3663,6 +3670,14 @@
         "util-deprecate": "~1.0.1"
       }
     },
+    "rechoir": {
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/rechoir/-/rechoir-0.6.2.tgz",
+      "integrity": "sha1-hSBLVNuoLVdC4oyWdW70OvUOM4Q=",
+      "requires": {
+        "resolve": "^1.1.6"
+      }
+    },
     "redent": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/redent/-/redent-1.0.0.tgz",
@@ -3910,9 +3925,14 @@
       }
     },
     "shelljs": {
-      "version": "0.6.1",
-      "resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.6.1.tgz",
-      "integrity": "sha1-7GIRvtGSBEIIj+D3Cyg3Iy7SyKg="
+      "version": "0.8.5",
+      "resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.8.5.tgz",
+      "integrity": "sha512-TiwcRcrkhHvbrZbnRcFYMLl30Dfov3HKqzp5tO5b4pt6G/SezKcYhmDg15zXVBswHmctSAQKznqNW2LO5tTDow==",
+      "requires": {
+        "glob": "^7.0.0",
+        "interpret": "^1.0.0",
+        "rechoir": "^0.6.2"
+      }
     },
     "signal-exit": {
       "version": "3.0.2",
@@ -4263,7 +4283,7 @@
         },
         "mkdirp": {
           "version": "0.3.5",
-          "resolved": "http://registry.npmjs.org/mkdirp/-/mkdirp-0.3.5.tgz",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.3.5.tgz",
           "integrity": "sha1-3j5fiWHIjHh+4TaN+EmsRBPsqNc="
         }
       }
diff --git a/package.json b/package.json
index 679ac19..b7bb81c 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "mime": "^1.2.11",
     "request": "^2.83.0",
     "resolve": "^1.1.7",
-    "shelljs": "^0.6.0",
+    "shelljs": "^0.8.5",
     "through2": "^2.0.0",
     "typogr": "^0.6.8",
     "xml2js": "^0.4.19"