diff --git a/package-lock.json b/package-lock.json
index 88ef637..37bb3ae 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,32 @@
   "lockfileVersion": 1,
   "requires": true,
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+      "resolved": "https://registry.npmjs.org/@mrmlnc/readdir-enhanced/-/readdir-enhanced-2.2.1.tgz",
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+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.7.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@types/q/-/q-1.5.4.tgz",
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@@ -27,6 +53,22 @@
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+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-1.1.0.tgz",
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+      "requires": {
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+      "resolved": "https://registry.npmjs.org/ansi-gray/-/ansi-gray-0.1.1.tgz",
+      "integrity": "sha1-KWLPVOyXksSFEKPetSRDaGHvclE=",
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@@ -37,18 +79,31 @@
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       "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4="
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+      "resolved": "https://registry.npmjs.org/ansi-wrap/-/ansi-wrap-0.1.0.tgz",
+      "integrity": "sha1-qCJQ3bABXponyoLoLqYDu/pF768="
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+      "resolved": "https://registry.npmjs.org/arch/-/arch-2.2.0.tgz",
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-      "integrity": "sha1-nNnABpV+vpX62tW9YJiUKoE3N/Y=",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/archive-type/-/archive-type-4.0.0.tgz",
+      "integrity": "sha1-+S5yIzBW38aWlHJ0nCZ72wRrHXA=",
+      "optional": true,
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-          "resolved": "https://registry.npmjs.org/file-type/-/file-type-3.9.0.tgz",
-          "integrity": "sha1-JXoHg4TR24CHvESdEH1SpSZyuek="
+          "version": "4.4.0",
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@@ -58,12 +113,12 @@
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-      "integrity": "sha1-c9g7wmP4bpf4zE9rrhsOkKfSLIY=",
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
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+        "sprintf-js": "~1.0.2"
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@@ -79,6 +134,11 @@
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+      "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
+      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ="
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@@ -97,7 +157,8 @@
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-      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E="
+      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=",
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@@ -119,7 +180,7 @@
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-        "array-uniq": "1.0.3"
+        "array-uniq": "^1.0.1"
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@@ -132,6 +193,11 @@
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       "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM="
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+    "arrify": {
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+      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
+      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0="
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@@ -150,6 +216,11 @@
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-      "resolved": "https://registry.npmjs.org/ware/-/ware-1.3.0.tgz",
-      "integrity": "sha1-0bFPOdLiy0q4xAmPdW/ksWTkc9Q=",
-      "requires": {
-        "wrap-fn": "0.1.5"
-      }
-    },
     "websocket-driver": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.0.tgz",
@@ -6681,12 +8489,6 @@
       "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.2.tgz",
       "integrity": "sha1-Dhh4HeYpoYMIzhSBZQ9n/6JpOl0="
     },
-    "whet.extend": {
-      "version": "0.9.9",
-      "resolved": "https://registry.npmjs.org/whet.extend/-/whet.extend-0.9.9.tgz",
-      "integrity": "sha1-+HfVv2SMl+WqVC+twW1qJZucEaE=",
-      "optional": true
-    },
     "which": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.0.tgz",
@@ -6695,12 +8497,17 @@
         "isexe": "2.0.0"
       }
     },
-    "wrap-fn": {
-      "version": "0.1.5",
-      "resolved": "https://registry.npmjs.org/wrap-fn/-/wrap-fn-0.1.5.tgz",
-      "integrity": "sha1-8htuQQFv9KfjFyDbxjoJAWvfmEU=",
+    "which-boxed-primitive": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz",
+      "integrity": "sha512-bwZdv0AKLpplFY2KZRX6TvyuN7ojjr7lwkg6ml0roIy9YeuSr7JS372qlNW18UQYzgYK9ziGcerWqZOmEn9VNg==",
+      "optional": true,
       "requires": {
-        "co": "3.1.0"
+        "is-bigint": "^1.0.1",
+        "is-boolean-object": "^1.1.0",
+        "is-number-object": "^1.0.4",
+        "is-string": "^1.0.5",
+        "is-symbol": "^1.0.3"
       }
     },
     "wrap-promise": {
@@ -6733,12 +8540,13 @@
       "optional": true
     },
     "yauzl": {
-      "version": "2.8.0",
-      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.8.0.tgz",
-      "integrity": "sha1-eUUK/yKyqcWkHvVOAtuQfM+/nuI=",
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
+      "optional": true,
       "requires": {
-        "buffer-crc32": "0.2.13",
-        "fd-slicer": "1.0.1"
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
       }
     }
   }
diff --git a/package.json b/package.json
index 5e07d85..c5e08ab 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "gulp-connect": "^5.0.0",
     "gulp-gh-pages": "^0.5.4",
     "gulp-htmlmin": "^3.0.0",
-    "gulp-imagemin": "^3.3.0",
+    "gulp-imagemin": "^5.0.0",
     "gulp-streamify": "^1.0.2",
     "gulp-uglify": "^3.0.0",
     "hammerjs": "^2.0.8",