diff --git a/package-lock.json b/package-lock.json
index 8a615db..1dac97e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,19 +1,9 @@
 {
   "name": "systemjs-less-plugin",
-  "version": "2.2.2",
+  "version": "2.2.3",
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@@ -29,53 +19,16 @@
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-      "dev": true,
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-      "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y=",
-      "dev": true,
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-      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
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-      "dev": true,
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-      "integrity": "sha1-g+9cqGCysy5KDe7e6MdxudtXRx4=",
-      "dev": true,
-      "optional": true
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       "resolved": "https://registry.npmjs.org/babel-cli/-/babel-cli-6.26.0.tgz",
@@ -472,6 +425,7 @@
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           "integrity": "sha1-gTg9ctsFT8zPUzbaqQLxgvbtuyg=",
           "dev": true,
+          "optional": true,
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@@ -516,7 +470,8 @@
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-          "dev": true
+          "dev": true,
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@@ -546,7 +501,8 @@
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           "integrity": "sha1-rEaBd8SUNAWgkvyPKXYMb/xiBsA=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -562,6 +518,7 @@
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           "integrity": "sha1-0Jb5JqPe1WAPP9/ZEZjLCIjC2GM=",
           "dev": true,
+          "optional": true,
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@@ -594,7 +551,8 @@
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           "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -623,6 +581,7 @@
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           "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
           "dev": true,
+          "optional": true,
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@@ -690,6 +649,7 @@
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           "integrity": "sha1-GrKLVW4Zg2Oowab35vogE3/mrtk=",
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -890,13 +850,15 @@
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           "integrity": "sha1-wkvOKig62tW8P1jg1IJJuSN52O8=",
-          "dev": true
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+          "optional": true
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           "integrity": "sha1-7wiaF40Ug7quTZPrmLT55OEdmQo=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -918,7 +880,8 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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         "set-immediate-shim": {
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@@ -1737,23 +1700,6 @@
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-      "integrity": "sha1-Y7xdy2EzG5K8Bf1SiVPDNGKgb40=",
-      "dev": true,
-      "optional": true,
-      "requires": {
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-      "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
-      "dev": true,
-      "requires": {
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@@ -1793,12 +1739,6 @@
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       "dev": true
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-      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=",
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@@ -1887,12 +1827,6 @@
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-      "integrity": "sha1-bqa989hTrlTMuOR7+gvz+QMfsYQ=",
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@@ -1902,19 +1836,20 @@
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-      "integrity": "sha1-k4NwpXtKUd6ix3wV1cX9+JUWQAk=",
-      "dev": true,
-      "requires": {
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       "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY="
     },
+    "copy-anything": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/copy-anything/-/copy-anything-2.0.1.tgz",
+      "integrity": "sha512-lA57e7viQHOdPQcrytv5jFeudZZOXuyk47lZym279FiDQ8jeZomXiGuVf6ffMKkJ+3TIai3J1J3yi6M+/4U35g==",
+      "dev": true,
+      "requires": {
+        "is-what": "^3.7.1"
+      }
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@@ -1926,30 +1861,14 @@
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-      "integrity": "sha1-O9/s3GCBR8HGcgL6KR59ylnqo7g=",
+    "debug": {
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+      "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz",
+      "integrity": "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==",
       "dev": true,
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-      }
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-      "integrity": "sha1-hTz6D3y+L+1d4gMmuN1YEDX24vA=",
-      "dev": true,
-      "optional": true,
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-          "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-          "dev": true,
-          "optional": true
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+        "ms": "^2.1.1"
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@@ -1965,20 +1884,6 @@
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-      "dev": true
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-      "integrity": "sha1-D8c6ntXw1Tw4GTOYUj735UN3dQU=",
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@@ -1986,13 +1891,13 @@
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-      "resolved": "https://registry.npmjs.org/errno/-/errno-0.1.4.tgz",
-      "integrity": "sha1-uJbiOp5ei6M4cfyZar02NfyaHH0=",
+      "version": "0.1.8",
+      "resolved": "https://registry.npmjs.org/errno/-/errno-0.1.8.tgz",
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       "dev": true,
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@@ -3030,12 +2935,6 @@
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@@ -3051,33 +2950,11 @@
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-      "dev": true,
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@@ -3123,7 +3000,8 @@
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@@ -3174,7 +3052,8 @@
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           "version": "0.4.2",
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+          "dev": true,
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@@ -3189,6 +3068,7 @@
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@@ -3197,6 +3077,7 @@
           "version": "2.10.1",
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@@ -3205,6 +3086,7 @@
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@@ -3213,7 +3095,8 @@
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@@ -3230,12 +3113,14 @@
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@@ -3243,22 +3128,26 @@
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@@ -3298,7 +3187,8 @@
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@@ -3330,7 +3220,8 @@
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@@ -3352,12 +3243,14 @@
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@@ -3413,6 +3306,7 @@
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@@ -3425,7 +3319,8 @@
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@@ -3453,6 +3348,7 @@
           "version": "3.1.3",
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@@ -3463,7 +3359,8 @@
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@@ -3480,6 +3377,7 @@
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@@ -3488,7 +3386,8 @@
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@@ -3500,6 +3399,7 @@
           "version": "1.0.0",
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           "dev": true,
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@@ -3513,7 +3413,8 @@
         "isarray": {
           "version": "1.0.0",
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+          "optional": true
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@@ -3586,12 +3487,14 @@
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-      "version": "https://registry.npmjs.org/qs/-/qs-6.4.0.tgz",
-      "integrity": "sha1-E+JtKK1rD/qpExLNO/cI7TUecjM=",
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-        "stringstream": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz",
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-      "integrity": "sha1-0mPKVGls2KMGtcplUekt5XkY++c=",
-      "dev": true
+    "safer-buffer": {
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+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
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+      "optional": true
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+    "sax": {
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+      "resolved": "https://registry.npmjs.org/sax/-/sax-1.2.4.tgz",
+      "integrity": "sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==",
+      "dev": true,
+      "optional": true
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@@ -7465,18 +7237,10 @@
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-    "sntp": {
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-      "integrity": "sha1-ZUEYTMkK7qbG57NeJlkIJEPGYZg=",
-      "dev": true,
-      "optional": true,
-      "requires": {
-        "hoek": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz"
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-      "version": "https://registry.npmjs.org/source-map/-/source-map-0.5.6.tgz",
-      "integrity": "sha1-dc449SvwczxafwwRjYEzSiu19BI=",
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
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@@ -7524,31 +7288,6 @@
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-      "integrity": "sha1-LY1eu0pvqyj/ujf6YqkPSj6lnXc=",
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-        "assert-plus": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-        "bcrypt-pbkdf": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz",
-        "dashdash": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
-        "ecc-jsbn": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
-        "getpass": "https://registry.npmjs.org/getpass/-/getpass-0.1.6.tgz",
-        "jodid25519": "https://registry.npmjs.org/jodid25519/-/jodid25519-1.0.2.tgz",
-        "jsbn": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz",
-        "tweetnacl": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz"
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@@ -7624,12 +7363,6 @@
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@@ -7766,29 +7499,11 @@
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-      "requires": {
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-    "tunnel-agent": {
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-      "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
-      "dev": true,
-      "optional": true,
-      "requires": {
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-    "tweetnacl": {
-      "version": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
-      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true,
-      "optional": true
+    "tslib": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
+      "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==",
+      "dev": true
     },
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@@ -7958,21 +7673,6 @@
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-    "uuid": {
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-      "integrity": "sha1-ZUS7ot/ajBzxfmKaOjBeK7H+5sE=",
-      "dev": true,
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-    "verror": {
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-      "integrity": "sha1-z/XfEpRtKX0rqu+qJoniW+AcAFw=",
-      "dev": true,
-      "optional": true,
-      "requires": {
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 }
diff --git a/package.json b/package.json
index 9f0d50f..bce557d 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
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     "babel-preset-env": "^1.6.1",
     "eslint": "^4.5.0",
-    "less": "^2.7.2",
+    "less": "^4.1.1",
     "mocha": "^3.5.0"
   },
   "jspm": {