diff --git a/package-lock.json b/package-lock.json
index 1c8e9de..a899999 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -969,14 +969,6 @@
         "safe-buffer": "^5.1.1"
       }
     },
-    "block-stream": {
-      "version": "0.0.9",
-      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz",
-      "integrity": "sha1-E+v+d4oDIFz+A3UUgeu0szAMEmo=",
-      "requires": {
-        "inherits": "~2.0.0"
-      }
-    },
     "bmp-js": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/bmp-js/-/bmp-js-0.1.0.tgz",
@@ -1169,6 +1161,11 @@
         "supports-color": "^2.0.0"
       }
     },
+    "chownr": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.1.tgz",
+      "integrity": "sha512-j38EvO5+LHX84jlo6h4UzmOwi0UgW61WRyPtJz4qaadK5eY3BTS5TY/S1Stc3Uk2lIM6TPevAlULiEJwie860g=="
+    },
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -2253,22 +2250,19 @@
       "resolved": "https://registry.npmjs.org/fs-constants/-/fs-constants-1.0.0.tgz",
       "integrity": "sha512-y6OAwoSIf7FyjMIv94u+b5rdheZEjzR63GTyZJm5qh4Bi+2YgwLCcI/fPFZkL5PSixOt6ZNKm+w+Hfp/Bciwow=="
     },
+    "fs-minipass": {
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-1.2.5.tgz",
+      "integrity": "sha512-JhBl0skXjUPCFH7x6x61gQxrKyXsxB5gcgePLZCwfyCGGsTISMoIeObbrvVeP6Xmyaudw4TT43qV2Gz+iyd2oQ==",
+      "requires": {
+        "minipass": "^2.2.1"
+      }
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
     },
-    "fstream": {
-      "version": "1.0.11",
-      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.11.tgz",
-      "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
-      "requires": {
-        "graceful-fs": "^4.1.2",
-        "inherits": "~2.0.0",
-        "mkdirp": ">=0.5 0",
-        "rimraf": "2"
-      }
-    },
     "function-bind": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
@@ -3584,6 +3578,30 @@
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
       "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
     },
+    "minipass": {
+      "version": "2.3.5",
+      "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.3.5.tgz",
+      "integrity": "sha512-Gi1W4k059gyRbyVUZQ4mEqLm0YIUiGYfvxhF6SIlk3ui1WVxMTGfGdQ2SInh3PDrRTVvPKgULkpJtT4RH10+VA==",
+      "requires": {
+        "safe-buffer": "^5.1.2",
+        "yallist": "^3.0.0"
+      },
+      "dependencies": {
+        "yallist": {
+          "version": "3.0.3",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
+          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+        }
+      }
+    },
+    "minizlib": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/minizlib/-/minizlib-1.2.1.tgz",
+      "integrity": "sha512-7+4oTUOWKg7AuL3vloEWekXY2/D20cevzsrNT2kGWm+39J9hGTCBv8VI5Pm5lXZ/o3/mdR4f8rflAPhnQb8mPA==",
+      "requires": {
+        "minipass": "^2.2.1"
+      }
+    },
     "mixin-deep": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/mixin-deep/-/mixin-deep-1.3.1.tgz",
@@ -3669,16 +3687,15 @@
       "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ=="
     },
     "node-addon-api": {
-      "version": "1.6.2",
-      "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-1.6.2.tgz",
-      "integrity": "sha512-479Bjw9nTE5DdBSZZWprFryHGjUaQC31y1wHo19We/k0BZlrmhqQitWoUL0cD8+scljCbIUL+E58oRDEakdGGA=="
+      "version": "1.6.3",
+      "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-1.6.3.tgz",
+      "integrity": "sha512-FXWH6mqjWgU8ewuahp4spec8LkroFZK2NicOv6bNwZC3kcwZUI8LeZdG80UzTSLLhK4T7MsgNwlYDVRlDdfTDg=="
     },
     "node-gyp": {
-      "version": "3.8.0",
-      "resolved": "https://registry.npmjs.org/node-gyp/-/node-gyp-3.8.0.tgz",
-      "integrity": "sha512-3g8lYefrRRzvGeSowdJKAKyks8oUpLEd/DyPV4eMhVlhJ0aNaZqIrNUIPuEWWTAoPqyFkfGrM67MC69baqn6vA==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/node-gyp/-/node-gyp-4.0.0.tgz",
+      "integrity": "sha512-2XiryJ8sICNo6ej8d0idXDEMKfVfFK7kekGCtJAuelGsYHQxhj13KTf95swTCN2dZ/4lTfZ84Fu31jqJEEgjWA==",
       "requires": {
-        "fstream": "^1.0.0",
         "glob": "^7.0.3",
         "graceful-fs": "^4.1.2",
         "mkdirp": "^0.5.0",
@@ -3688,7 +3705,7 @@
         "request": "^2.87.0",
         "rimraf": "2",
         "semver": "~5.3.0",
-        "tar": "^2.0.0",
+        "tar": "^4.4.8",
         "which": "1"
       },
       "dependencies": {
@@ -3700,19 +3717,19 @@
       }
     },
     "node-zopfli-es": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/node-zopfli-es/-/node-zopfli-es-1.0.1.tgz",
-      "integrity": "sha512-wlU5qnddG2Brv/v9IiHQI3m81lgr3wzCkG8U/2GxgNUK+Gdv2OHmUI2dU6Rkfy2j/gD5sX6pOXxaCkCViRXeHA==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/node-zopfli-es/-/node-zopfli-es-1.0.2.tgz",
+      "integrity": "sha512-8szDxRkojFLc9mRCJUO+sw6eD32s189vWex01fYOQ95xdBoNg2ac7HMrrkEQAlSc6sUl7EqYnNCNlrGkvBNMqw==",
       "requires": {
-        "commander": "2.19.0",
-        "node-addon-api": "1.6.2",
-        "node-gyp": "3.8.0"
+        "commander": "2.20.0",
+        "node-addon-api": "1.6.3",
+        "node-gyp": "4.0.0"
       },
       "dependencies": {
         "commander": {
-          "version": "2.19.0",
-          "resolved": "https://registry.npmjs.org/commander/-/commander-2.19.0.tgz",
-          "integrity": "sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg=="
+          "version": "2.20.0",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
+          "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ=="
         }
       }
     },
@@ -5344,13 +5361,24 @@
       }
     },
     "tar": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz",
-      "integrity": "sha1-jk0qJWwOIYXGsYrWlK7JaLg8sdE=",
-      "requires": {
-        "block-stream": "*",
-        "fstream": "^1.0.2",
-        "inherits": "2"
+      "version": "4.4.8",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.8.tgz",
+      "integrity": "sha512-LzHF64s5chPQQS0IYBn9IN5h3i98c12bo4NCO7e0sGM2llXQ3p2FGC5sdENN4cTW48O915Sh+x+EXx7XW96xYQ==",
+      "requires": {
+        "chownr": "^1.1.1",
+        "fs-minipass": "^1.2.5",
+        "minipass": "^2.3.4",
+        "minizlib": "^1.1.1",
+        "mkdirp": "^0.5.0",
+        "safe-buffer": "^5.1.2",
+        "yallist": "^3.0.2"
+      },
+      "dependencies": {
+        "yallist": {
+          "version": "3.0.3",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
+          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+        }
       }
     },
     "tar-stream": {
diff --git a/package.json b/package.json
index 89e7e4c..ce304f8 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "imagemin-mozjpeg": "8.0.0",
     "imagemin-pngquant": "7.0.0",
     "imagemin-svgo": "7.0.0",
-    "node-zopfli-es": "1.0.1",
+    "node-zopfli-es": "1.0.2",
     "purify-css": "1.2.5"
   },
   "devDependencies": {