diff --git a/lib/upgrade.txt b/lib/upgrade.txt
index a8cccd770e4f9..ffcba569010d2 100644
--- a/lib/upgrade.txt
+++ b/lib/upgrade.txt
@@ -3,6 +3,7 @@ information provided here is intended especially for developers.
 
 === 3.2 ===
 
+* Node.js versions >=4 are now required to run grunt.
 * New option 'blanktarget' added to format_text. This option adds target="_blank" to links
 * A new webservice structure `external_files` has been created which provides a standardised view of files in Moodle and
   should be used for all file return descriptions.
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 8ad8f15450334..8da441728df81 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -17,9 +17,9 @@
       "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-3.0.1.tgz"
     },
     "align-text": {
-      "version": "0.1.3",
-      "from": "align-text@>=0.1.0 <0.2.0",
-      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.3.tgz"
+      "version": "0.1.4",
+      "from": "align-text@>=0.1.3 <0.2.0",
+      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz"
     },
     "amdefine": {
       "version": "1.0.0",
@@ -47,16 +47,9 @@
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.1.0.tgz"
     },
     "argparse": {
-      "version": "0.1.16",
-      "from": "argparse@>=0.1.11 <0.2.0",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-0.1.16.tgz",
-      "dependencies": {
-        "underscore.string": {
-          "version": "2.4.0",
-          "from": "underscore.string@>=2.4.0 <2.5.0",
-          "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-2.4.0.tgz"
-        }
-      }
+      "version": "1.0.7",
+      "from": "argparse@>=1.0.2 <2.0.0",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.7.tgz"
     },
     "array-union": {
       "version": "1.0.2",
@@ -74,9 +67,9 @@
       "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz"
     },
     "asap": {
-      "version": "1.0.0",
-      "from": "asap@>=1.0.0 <1.1.0",
-      "resolved": "https://registry.npmjs.org/asap/-/asap-1.0.0.tgz"
+      "version": "2.0.4",
+      "from": "asap@>=2.0.3 <2.1.0",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.4.tgz"
     },
     "asn1": {
       "version": "0.2.3",
@@ -84,9 +77,9 @@
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz"
     },
     "assert-plus": {
-      "version": "0.1.5",
-      "from": "assert-plus@>=0.1.5 <0.2.0",
-      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.1.5.tgz"
+      "version": "0.2.0",
+      "from": "assert-plus@>=0.2.0 <0.3.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz"
     },
     "async": {
       "version": "1.5.2",
@@ -98,20 +91,30 @@
       "from": "aws-sign2@>=0.6.0 <0.7.0",
       "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz"
     },
+    "aws4": {
+      "version": "1.4.1",
+      "from": "aws4@>=1.2.1 <2.0.0",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.4.1.tgz"
+    },
     "balanced-match": {
       "version": "0.3.0",
       "from": "balanced-match@>=0.3.0 <0.4.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.3.0.tgz"
     },
     "bl": {
-      "version": "1.0.0",
-      "from": "bl@>=1.0.0 <1.1.0",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-1.0.0.tgz",
+      "version": "1.1.2",
+      "from": "bl@>=1.1.2 <1.2.0",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-1.1.2.tgz",
       "dependencies": {
+        "isarray": {
+          "version": "1.0.0",
+          "from": "isarray@>=1.0.0 <1.1.0",
+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz"
+        },
         "readable-stream": {
-          "version": "2.0.5",
-          "from": "readable-stream@>=2.0.0 <2.1.0",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.5.tgz"
+          "version": "2.0.6",
+          "from": "readable-stream@>=2.0.5 <2.1.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz"
         }
       }
     },
@@ -120,6 +123,18 @@
       "from": "bluebird@>=3.1.1 <4.0.0",
       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.4.1.tgz"
     },
+    "body-parser": {
+      "version": "1.14.2",
+      "from": "body-parser@>=1.14.0 <1.15.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.14.2.tgz",
+      "dependencies": {
+        "debug": {
+          "version": "2.2.0",
+          "from": "debug@~2.2.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz"
+        }
+      }
+    },
     "boom": {
       "version": "2.10.1",
       "from": "boom@>=2.0.0 <3.0.0",
@@ -140,6 +155,11 @@
       "from": "builtin-modules@>=1.0.0 <2.0.0",
       "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz"
     },
+    "bytes": {
+      "version": "2.2.0",
+      "from": "bytes@2.2.0",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-2.2.0.tgz"
+    },
     "caller-path": {
       "version": "0.1.0",
       "from": "caller-path@>=0.1.0 <0.2.0",
@@ -166,9 +186,9 @@
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.11.0.tgz"
     },
     "center-align": {
-      "version": "0.1.2",
+      "version": "0.1.3",
       "from": "center-align@>=0.1.1 <0.2.0",
-      "resolved": "https://registry.npmjs.org/center-align/-/center-align-0.1.2.tgz"
+      "resolved": "https://registry.npmjs.org/center-align/-/center-align-0.1.3.tgz"
     },
     "chalk": {
       "version": "1.1.1",
@@ -213,14 +233,14 @@
       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.0.0.tgz"
     },
     "coffee-script": {
-      "version": "1.3.3",
-      "from": "coffee-script@>=1.3.3 <1.4.0",
-      "resolved": "https://registry.npmjs.org/coffee-script/-/coffee-script-1.3.3.tgz"
+      "version": "1.10.0",
+      "from": "coffee-script@>=1.10.0 <1.11.0",
+      "resolved": "https://registry.npmjs.org/coffee-script/-/coffee-script-1.10.0.tgz"
     },
     "colors": {
-      "version": "0.6.2",
-      "from": "colors@>=0.6.2 <0.7.0",
-      "resolved": "https://registry.npmjs.org/colors/-/colors-0.6.2.tgz"
+      "version": "1.1.2",
+      "from": "colors@>=1.1.2 <1.2.0",
+      "resolved": "https://registry.npmjs.org/colors/-/colors-1.1.2.tgz"
     },
     "combined-stream": {
       "version": "1.0.5",
@@ -254,6 +274,11 @@
       "from": "console-browserify@>=1.1.0 <1.2.0",
       "resolved": "https://registry.npmjs.org/console-browserify/-/console-browserify-1.1.0.tgz"
     },
+    "content-type": {
+      "version": "1.0.2",
+      "from": "content-type@>=1.0.1 <1.1.0",
+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.2.tgz"
+    },
     "core-util-is": {
       "version": "1.0.2",
       "from": "core-util-is@>=1.0.0 <1.1.0",
@@ -302,9 +327,16 @@
       "resolved": "https://registry.npmjs.org/d/-/d-0.1.1.tgz"
     },
     "dashdash": {
-      "version": "1.12.1",
-      "from": "dashdash@>=1.10.1 <2.0.0",
-      "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.12.1.tgz"
+      "version": "1.14.0",
+      "from": "dashdash@>=1.12.0 <2.0.0",
+      "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.0.tgz",
+      "dependencies": {
+        "assert-plus": {
+          "version": "1.0.0",
+          "from": "assert-plus@>=1.0.0 <2.0.0",
+          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz"
+        }
+      }
     },
     "date-now": {
       "version": "0.1.4",
@@ -312,9 +344,9 @@
       "resolved": "https://registry.npmjs.org/date-now/-/date-now-0.1.4.tgz"
     },
     "dateformat": {
-      "version": "1.0.2-1.2.3",
-      "from": "dateformat@1.0.2-1.2.3",
-      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-1.0.2-1.2.3.tgz"
+      "version": "1.0.12",
+      "from": "dateformat@>=1.0.12 <1.1.0",
+      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-1.0.12.tgz"
     },
     "debug": {
       "version": "0.7.4",
@@ -341,6 +373,11 @@
       "from": "delayed-stream@>=1.0.0 <1.1.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz"
     },
+    "depd": {
+      "version": "1.1.0",
+      "from": "depd@>=1.1.0 <1.2.0",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.0.tgz"
+    },
     "doctrine": {
       "version": "1.2.2",
       "from": "doctrine@>=1.2.2 <2.0.0",
@@ -395,6 +432,11 @@
       "from": "ecc-jsbn@>=0.0.1 <1.0.0",
       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz"
     },
+    "ee-first": {
+      "version": "1.1.1",
+      "from": "ee-first@1.1.1",
+      "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz"
+    },
     "entities": {
       "version": "1.0.0",
       "from": "entities@>=1.0.0 <1.1.0",
@@ -470,20 +512,15 @@
       }
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     "eslint": {
-      "version": "2.13.1",
-      "from": "eslint@2.13.1",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-2.13.1.tgz",
+      "version": "3.0.1",
+      "from": "eslint@3.0.1",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-3.0.1.tgz",
       "dependencies": {
         "ansi-styles": {
           "version": "2.2.1",
           "from": "ansi-styles@>=2.2.1 <3.0.0",
           "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz"
         },
-        "argparse": {
-          "version": "1.0.7",
-          "from": "argparse@>=1.0.7 <2.0.0",
-          "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.7.tgz"
-        },
         "chalk": {
           "version": "1.1.3",
           "from": "chalk@>=1.1.3 <2.0.0",
@@ -494,11 +531,6 @@
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           "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz"
         },
-        "esprima": {
-          "version": "2.7.2",
-          "from": "esprima@>=2.6.0 <3.0.0",
-          "resolved": "https://registry.npmjs.org/esprima/-/esprima-2.7.2.tgz"
-        },
         "estraverse": {
           "version": "4.2.0",
           "from": "estraverse@>=4.2.0 <5.0.0",
@@ -509,11 +541,6 @@
           "from": "glob@>=7.0.3 <8.0.0",
           "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.5.tgz"
         },
-        "js-yaml": {
-          "version": "3.6.1",
-          "from": "js-yaml@>=3.5.1 <4.0.0",
-          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.6.1.tgz"
-        },
         "lodash": {
           "version": "4.13.1",
           "from": "lodash@>=4.0.0 <5.0.0",
@@ -533,6 +560,11 @@
           "version": "0.6.0",
           "from": "shelljs@>=0.6.0 <0.7.0",
           "resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.6.0.tgz"
+        },
+        "strip-bom": {
+          "version": "3.0.0",
+          "from": "strip-bom@>=3.0.0 <4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz"
         }
       }
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@@ -604,9 +636,9 @@
       "resolved": "https://registry.npmjs.org/fast-levenshtein/-/fast-levenshtein-1.1.3.tgz"
     },
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-      "from": "faye-websocket@>=0.4.3 <0.5.0",
-      "resolved": "https://registry.npmjs.org/faye-websocket/-/faye-websocket-0.4.4.tgz"
+      "version": "0.10.0",
+      "from": "faye-websocket@>=0.10.0 <0.11.0",
+      "resolved": "https://registry.npmjs.org/faye-websocket/-/faye-websocket-0.10.0.tgz"
     },
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@@ -629,24 +661,19 @@
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     },
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-      "from": "findup-sync@>=0.1.2 <0.2.0",
-      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-0.1.3.tgz",
+      "version": "0.3.0",
+      "from": "findup-sync@>=0.3.0 <0.4.0",
+      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-0.3.0.tgz",
       "dependencies": {
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-          "version": "3.2.11",
-          "from": "glob@>=3.2.9 <3.3.0",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-3.2.11.tgz"
-        },
-        "lodash": {
-          "version": "2.4.2",
-          "from": "lodash@>=2.4.1 <2.5.0",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-2.4.2.tgz"
+          "version": "5.0.15",
+          "from": "glob@>=5.0.0 <5.1.0",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz"
         },
         "minimatch": {
-          "version": "0.3.0",
-          "from": "minimatch@>=0.3.0 <0.4.0",
-          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-0.3.0.tgz"
+          "version": "3.0.2",
+          "from": "minimatch@2 || 3",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.2.tgz"
         }
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@@ -668,16 +695,9 @@
       "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz"
     },
     "form-data": {
-      "version": "1.0.0-rc3",
+      "version": "1.0.0-rc4",
       "from": "form-data@>=1.0.0-rc3 <1.1.0",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-1.0.0-rc3.tgz",
-      "dependencies": {
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-          "from": "async@>=1.4.0 <2.0.0",
-          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz"
-        }
-      }
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-1.0.0-rc4.tgz"
     },
     "fs.realpath": {
       "version": "1.0.0",
@@ -685,9 +705,9 @@
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz"
     },
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-      "from": "gaze@>=0.5.1 <0.6.0",
-      "resolved": "https://registry.npmjs.org/gaze/-/gaze-0.5.2.tgz"
+      "version": "1.1.0",
+      "from": "gaze@>=1.0.0 <2.0.0",
+      "resolved": "https://registry.npmjs.org/gaze/-/gaze-1.1.0.tgz"
     },
     "gear": {
       "version": "0.8.18",
@@ -780,6 +800,18 @@
       "from": "getobject@>=0.1.0 <0.2.0",
       "resolved": "https://registry.npmjs.org/getobject/-/getobject-0.1.0.tgz"
     },
+    "getpass": {
+      "version": "0.1.6",
+      "from": "getpass@>=0.1.1 <0.2.0",
+      "resolved": "https://registry.npmjs.org/getpass/-/getpass-0.1.6.tgz",
+      "dependencies": {
+        "assert-plus": {
+          "version": "1.0.0",
+          "from": "assert-plus@>=1.0.0 <2.0.0",
+          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz"
+        }
+      }
+    },
     "glob": {
       "version": "3.1.21",
       "from": "glob@>=3.1.21 <3.2.0",
@@ -793,9 +825,9 @@
       }
     },
     "globals": {
-      "version": "9.8.0",
+      "version": "9.9.0",
       "from": "globals@>=9.2.0 <10.0.0",
-      "resolved": "https://registry.npmjs.org/globals/-/globals-9.8.0.tgz"
+      "resolved": "https://registry.npmjs.org/globals/-/globals-9.9.0.tgz"
     },
     "globby": {
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@@ -815,14 +847,24 @@
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-      "from": "globule@>=0.1.0 <0.2.0",
-      "resolved": "https://registry.npmjs.org/globule/-/globule-0.1.0.tgz",
+      "version": "1.0.0",
+      "from": "globule@>=1.0.0 <2.0.0",
+      "resolved": "https://registry.npmjs.org/globule/-/globule-1.0.0.tgz",
       "dependencies": {
+        "glob": {
+          "version": "7.0.5",
+          "from": "glob@>=7.0.3 <7.1.0",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.5.tgz"
+        },
         "lodash": {
-          "version": "1.0.2",
-          "from": "lodash@>=1.0.1 <1.1.0",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-1.0.2.tgz"
+          "version": "4.9.0",
+          "from": "lodash@>=4.9.0 <4.10.0",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.9.0.tgz"
+        },
+        "minimatch": {
+          "version": "3.0.2",
+          "from": "minimatch@>=3.0.0 <3.1.0",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.2.tgz"
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@@ -837,111 +879,107 @@
       "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz"
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-      "version": "0.4.5",
-      "from": "grunt@0.4.5",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-0.4.5.tgz",
+      "version": "1.0.1",
+      "from": "grunt@1.0.1",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.0.1.tgz",
       "dependencies": {
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-          "from": "async@>=0.1.22 <0.2.0",
-          "resolved": "https://registry.npmjs.org/async/-/async-0.1.22.tgz"
+        "glob": {
+          "version": "7.0.5",
+          "from": "glob@>=7.0.0 <7.1.0",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.5.tgz"
+        },
+        "grunt-cli": {
+          "version": "1.2.0",
+          "from": "grunt-cli@>=1.2.0 <1.3.0",
+          "resolved": "https://registry.npmjs.org/grunt-cli/-/grunt-cli-1.2.0.tgz"
+        },
+        "minimatch": {
+          "version": "3.0.2",
+          "from": "minimatch@>=3.0.0 <3.1.0",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.2.tgz"
+        },
+        "nopt": {
+          "version": "3.0.6",
+          "from": "nopt@>=3.0.6 <3.1.0",
+          "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz"
+        },
+        "resolve": {
+          "version": "1.1.7",
+          "from": "resolve@>=1.1.0 <1.2.0",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz"
         }
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     "grunt-contrib-less": {
-      "version": "1.1.0",
-      "from": "grunt-contrib-less@1.1.0",
-      "resolved": "https://registry.npmjs.org/grunt-contrib-less/-/grunt-contrib-less-1.1.0.tgz",
+      "version": "1.3.0",
+      "from": "grunt-contrib-less@1.3.0",
+      "resolved": "https://registry.npmjs.org/grunt-contrib-less/-/grunt-contrib-less-1.3.0.tgz",
       "dependencies": {
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       "from": "request@>=2.51.0 <3.0.0",
-      "resolved": "https://registry.npmjs.org/request/-/request-2.67.0.tgz"
+      "resolved": "https://registry.npmjs.org/request/-/request-2.72.0.tgz",
+      "dependencies": {
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+          "from": "qs@>=6.1.0 <6.2.0",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.1.0.tgz"
+        }
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@@ -1715,17 +1809,22 @@
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz"
     },
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-      "version": "1.7.3",
+      "version": "1.8.3",
       "from": "sshpk@>=1.7.0 <2.0.0",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.7.3.tgz",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.8.3.tgz",
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-          "version": "0.2.0",
-          "from": "assert-plus@>=0.2.0 <0.3.0",
-          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz"
+          "version": "1.0.0",
+          "from": "assert-plus@>=1.0.0 <2.0.0",
+          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz"
         }
       }
     },
+    "statuses": {
+      "version": "1.3.0",
+      "from": "statuses@>=1.0.0 <2.0.0",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.3.0.tgz"
+    },
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@@ -1805,22 +1904,27 @@
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-      "from": "tiny-lr-fork@0.0.5",
-      "resolved": "https://registry.npmjs.org/tiny-lr-fork/-/tiny-lr-fork-0.0.5.tgz",
+    "tiny-lr": {
+      "version": "0.2.1",
+      "from": "tiny-lr@>=0.2.1 <0.3.0",
+      "resolved": "https://registry.npmjs.org/tiny-lr/-/tiny-lr-0.2.1.tgz",
       "dependencies": {
+        "debug": {
+          "version": "2.2.0",
+          "from": "debug@>=2.2.0 <2.3.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz"
+        },
         "qs": {
-          "version": "0.5.6",
-          "from": "qs@>=0.5.2 <0.6.0",
-          "resolved": "https://registry.npmjs.org/qs/-/qs-0.5.6.tgz"
+          "version": "5.1.0",
+          "from": "qs@>=5.1.0 <5.2.0",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-5.1.0.tgz"
         }
       }
     },
     "tough-cookie": {
-      "version": "2.2.1",
+      "version": "2.2.2",
       "from": "tough-cookie@>=2.2.0 <2.3.0",
-      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.2.1.tgz"
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.2.2.tgz"
     },
     "trim-newlines": {
       "version": "1.0.0",
@@ -1833,9 +1937,9 @@
       "resolved": "https://registry.npmjs.org/tryit/-/tryit-1.0.2.tgz"
     },
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-      "version": "0.4.2",
+      "version": "0.4.3",
       "from": "tunnel-agent@>=0.4.1 <0.5.0",
-      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.4.2.tgz"
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.4.3.tgz"
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@@ -1852,15 +1956,32 @@
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       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz"
     },
+    "type-is": {
+      "version": "1.6.13",
+      "from": "type-is@>=1.6.10 <1.7.0",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.13.tgz",
+      "dependencies": {
+        "mime-db": {
+          "version": "1.23.0",
+          "from": "mime-db@>=1.23.0 <1.24.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.23.0.tgz"
+        },
+        "mime-types": {
+          "version": "2.1.11",
+          "from": "mime-types@>=2.1.11 <2.2.0",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.11.tgz"
+        }
+      }
+    },
     "typedarray": {
       "version": "0.0.6",
       "from": "typedarray@>=0.0.5 <0.1.0",
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz"
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     "uglify-js": {
-      "version": "2.6.1",
-      "from": "uglify-js@>=2.6.0 <2.7.0",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.6.1.tgz",
+      "version": "2.6.4",
+      "from": "uglify-js@>=2.6.2 <2.7.0",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.6.4.tgz",
       "dependencies": {
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           "version": "0.2.10",
@@ -1868,9 +1989,9 @@
           "resolved": "https://registry.npmjs.org/async/-/async-0.2.10.tgz"
         },
         "source-map": {
-          "version": "0.5.3",
+          "version": "0.5.6",
           "from": "source-map@>=0.5.1 <0.6.0",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.3.tgz"
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.6.tgz"
         }
       }
     },
@@ -1879,15 +2000,15 @@
       "from": "uglify-to-browserify@>=1.0.0 <1.1.0",
       "resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz"
     },
-    "underscore": {
-      "version": "1.7.0",
-      "from": "underscore@>=1.7.0 <1.8.0",
-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.7.0.tgz"
-    },
     "underscore.string": {
-      "version": "2.2.1",
-      "from": "underscore.string@>=2.2.1 <2.3.0",
-      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-2.2.1.tgz"
+      "version": "3.2.3",
+      "from": "underscore.string@>=3.2.3 <3.3.0",
+      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.2.3.tgz"
+    },
+    "unpipe": {
+      "version": "1.0.0",
+      "from": "unpipe@1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz"
     },
     "uri-path": {
       "version": "1.0.0",
@@ -1924,6 +2045,16 @@
       "from": "watch@>=0.8.0 <0.9.0",
       "resolved": "https://registry.npmjs.org/watch/-/watch-0.8.0.tgz"
     },
+    "websocket-driver": {
+      "version": "0.6.5",
+      "from": "websocket-driver@>=0.5.1",
+      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.6.5.tgz"
+    },
+    "websocket-extensions": {
+      "version": "0.1.1",
+      "from": "websocket-extensions@>=0.1.1",
+      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.1.tgz"
+    },
     "which": {
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       "from": "which@>=1.0.5 <1.1.0",
diff --git a/package.json b/package.json
index eaada7df53044..3105866a90f24 100644
--- a/package.json
+++ b/package.json
@@ -3,15 +3,18 @@
   "private": true,
   "description": "Moodle",
   "devDependencies": {
-    "async": "^1.5.2",
-    "eslint": "^2.13.1",
-    "grunt": "0.4.5",
-    "grunt-contrib-less": "1.1.0",
-    "grunt-contrib-uglify": "0.11.0",
-    "grunt-contrib-watch": "0.6.1",
-    "grunt-eslint": "^18.1.0",
+    "async": "1.5.2",
+    "eslint": "^3.0.1",
+    "grunt": "1.0.1",
+    "grunt-contrib-less": "1.3.0",
+    "grunt-contrib-uglify": "1.0.1",
+    "grunt-contrib-watch": "1.0.0",
+    "grunt-eslint": "19.0.0",
     "shifter": "0.5.0",
-    "xmldom": "^0.1.22",
+    "xmldom": "0.1.22",
     "xpath": "0.0.23"
+  },
+  "engines": {
+    "node": ">=4"
   }
 }