diff --git a/package-lock.json b/package-lock.json
index 4a99033..81a96b1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,12 @@
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-        "semver": "4.3.6",
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-      "integrity": "sha1-qe8VNmDWqGqL3sAomlxoTSF0Mv0=",
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-          "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
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@@ -5925,8 +6191,8 @@
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-        "uuid": "3.3.2"
+        "temp-dir": "^1.0.0",
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@@ -5985,8 +6251,8 @@
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-        "through2": "2.0.3",
-        "xtend": "4.0.1"
+        "through2": "~2.0.0",
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@@ -6020,7 +6286,7 @@
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-            "is-extendable": "0.1.1"
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-        "escape-string-regexp": "1.0.5"
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+    "unquote": {
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+      "resolved": "https://registry.npmjs.org/unquote/-/unquote-1.1.1.tgz",
+      "integrity": "sha1-j97XMk7G6IoP+LkF58CYzcCG1UQ=",
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@@ -6297,7 +6569,7 @@
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-        "prepend-http": "1.0.4"
+        "prepend-http": "^1.0.1"
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@@ -6306,7 +6578,7 @@
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-        "ip-regex": "1.0.3"
+        "ip-regex": "^1.0.1"
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       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
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+    "util.promisify": {
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+      "resolved": "https://registry.npmjs.org/util.promisify/-/util.promisify-1.0.0.tgz",
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@@ -6376,8 +6658,8 @@
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-        "readable-stream": "2.3.6"
+        "object-assign": "^4.0.1",
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@@ -6392,16 +6674,16 @@
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+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
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-            "string_decoder": "1.1.1",
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@@ -6478,7 +6760,7 @@
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-        "wrap-fn": "0.1.5"
+        "wrap-fn": "^0.1.0"
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@@ -6495,12 +6777,6 @@
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@@ -6616,8 +6892,8 @@
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       "requires": {
-        "buffer-crc32": "0.2.13",
-        "fd-slicer": "1.1.0"
+        "buffer-crc32": "~0.2.3",
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diff --git a/package.json b/package.json
index 8dbba7f..cc74d8a 100644
--- a/package.json
+++ b/package.json
@@ -8,11 +8,11 @@
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     "gulp-uglify": "^2.1.2",
     "gulp-livereload": "^3.8.1",
-    "gulp-imagemin": "^3.4.0",
+    "gulp-imagemin": "^4.0.0",
     "pump": "^1.0.2"
   },
   "devDependencies": {
-    "gulp-imagemin": "^3.1.1",
+    "gulp-imagemin": "^4.0.0",
     "gulp-livereload": "^3.8.1"
   }
 }