diff --git a/package-lock.json b/package-lock.json
index d3d7672..43c3379 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -212,6 +212,7 @@
       "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz",
       "integrity": "sha1-E+v+d4oDIFz+A3UUgeu0szAMEmo=",
       "dev": true,
+      "optional": true,
       "requires": {
         "inherits": "~2.0.0"
       }
@@ -629,6 +630,15 @@
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       "dev": true
     },
+    "fs-minipass": {
+      "version": "1.2.7",
+      "resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-1.2.7.tgz",
+      "integrity": "sha512-GWSSJGFy4e9GUeCcbIkED+bgAoFyj7XF1mV8rma3QW4NIqX9Kyx79N/PF61H5udOV3aY1IaMLs6pGbH71nlCTA==",
+      "dev": true,
+      "requires": {
+        "minipass": "^2.6.0"
+      }
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -1227,11 +1237,31 @@
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       "dev": true
     },
+    "minipass": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.9.0.tgz",
+      "integrity": "sha512-wxfUjg9WebH+CUDX/CdbRlh5SmfZiy/hpkxaRI16Y9W56Pa75sWgd/rvFilSgrauD9NyFymP/+JFV3KwzIsJeg==",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "^5.1.2",
+        "yallist": "^3.0.0"
+      }
+    },
+    "minizlib": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/minizlib/-/minizlib-1.3.3.tgz",
+      "integrity": "sha512-6ZYMOEnmVsdCeTJVE0W9ZD+pVnE8h9Hma/iOwwRDsdQoePpoX56/8B6z3P9VNwppJuBKNRuFDRNRqRWexT9G9Q==",
+      "dev": true,
+      "requires": {
+        "minipass": "^2.9.0"
+      }
+    },
     "mkdirp": {
       "version": "0.5.1",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
       "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
       "dev": true,
+      "optional": true,
       "requires": {
         "minimist": "0.0.8"
       },
@@ -1240,7 +1270,8 @@
           "version": "0.0.8",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
           "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -1289,6 +1320,18 @@
           "integrity": "sha1-myzl094C0XxgEq0yaqa00M9U+U8=",
           "dev": true,
           "optional": true
+        },
+        "tar": {
+          "version": "2.2.2",
+          "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.2.tgz",
+          "integrity": "sha512-FCEhQ/4rE1zYv9rYXJw/msRqsnmlje5jHP6huWeBZ704jUTy02c5AZyWujpMR1ax6mVw9NyJMfuK2CMDWVIfgA==",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "block-stream": "*",
+            "fstream": "^1.0.12",
+            "inherits": "2"
+          }
         }
       }
     },
@@ -1666,7 +1709,8 @@
       "version": "2.2.8",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
       "integrity": "sha1-5Dm+Kq7jJzIZUnMPmaiSnk/FBYI=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "safe-buffer": {
       "version": "5.1.2",
@@ -1839,27 +1883,40 @@
       "dev": true
     },
     "tar": {
-      "version": "2.2.2",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.2.tgz",
-      "integrity": "sha512-FCEhQ/4rE1zYv9rYXJw/msRqsnmlje5jHP6huWeBZ704jUTy02c5AZyWujpMR1ax6mVw9NyJMfuK2CMDWVIfgA==",
-      "dev": true,
-      "requires": {
-        "block-stream": "*",
-        "fstream": "^1.0.12",
-        "inherits": "2"
+      "version": "4.4.18",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.18.tgz",
+      "integrity": "sha512-ZuOtqqmkV9RE1+4odd+MhBpibmCxNP6PJhH/h2OqNuotTX7/XHPZQJv2pKvWMplFH9SIZZhitehh6vBH6LO8Pg==",
+      "dev": true,
+      "requires": {
+        "chownr": "^1.1.4",
+        "fs-minipass": "^1.2.7",
+        "minipass": "^2.9.0",
+        "minizlib": "^1.3.3",
+        "mkdirp": "^0.5.5",
+        "safe-buffer": "^5.2.1",
+        "yallist": "^3.1.1"
       },
       "dependencies": {
-        "fstream": {
-          "version": "1.0.12",
-          "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.12.tgz",
-          "integrity": "sha512-WvJ193OHa0GHPEL+AycEJgxvBEwyfRkN1vhjca23OaPVMCaLCXTd5qAu82AjTcgP1UJmytkOKb63Ypde7raDIg==",
+        "chownr": {
+          "version": "1.1.4",
+          "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
+          "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg==",
+          "dev": true
+        },
+        "mkdirp": {
+          "version": "0.5.5",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+          "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
           "dev": true,
           "requires": {
-            "graceful-fs": "^4.1.2",
-            "inherits": "~2.0.0",
-            "mkdirp": ">=0.5 0",
-            "rimraf": "2"
+            "minimist": "^1.2.5"
           }
+        },
+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+          "dev": true
         }
       }
     },
@@ -2044,6 +2101,12 @@
       "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
       "dev": true
     },
+    "yallist": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
+      "dev": true
+    },
     "zip-stream": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/zip-stream/-/zip-stream-1.2.0.tgz",
diff --git a/package.json b/package.json
index b3c5603..002592b 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "grunt-contrib-compress": "^1.4.3",
     "grunt-shell": "^2.1.0",
     "lodash": "^4.17.12",
-    "tar": "^2.2.2"
+    "tar": "^4.4.18"
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"