diff --git a/package-lock.json b/package-lock.json
index e35a3444a..e524ca90c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10931,160 +10931,82 @@
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-      "resolved": "https://registry.npmjs.org/less/-/less-2.7.3.tgz",
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+      "version": "3.12.2",
+      "resolved": "https://registry.npmjs.org/less/-/less-3.12.2.tgz",
+      "integrity": "sha512-+1V2PCMFkL+OIj2/HrtrvZw0BC0sYLMICJfbQjuj/K8CEnlrFX6R5cKKgzzttsZDHyxQNL1jqMREjKN3ja/E3Q==",
       "dev": true,
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         "errno": "^0.1.1",
         "graceful-fs": "^4.1.2",
         "image-size": "~0.5.0",
-        "mime": "^1.2.11",
-        "mkdirp": "^0.5.0",
-        "promise": "^7.1.1",
-        "request": "2.81.0",
-        "source-map": "^0.5.3"
+        "make-dir": "^2.1.0",
+        "mime": "^1.4.1",
+        "native-request": "^1.0.5",
+        "source-map": "~0.6.0",
+        "tslib": "^1.10.0"
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-        "ajv": {
-          "version": "4.11.8",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-4.11.8.tgz",
-          "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
+        "make-dir": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-2.1.0.tgz",
+          "integrity": "sha512-LS9X+dc8KLxXCb8dni79fLIIUA5VyZoyjSMCwTluaXA0o27cCK0bhXkpgw+sTXVpPy/lSO57ilRixqk0vDmtRA==",
           "dev": true,
           "optional": true,
           "requires": {
-            "co": "^4.6.0",
-            "json-stable-stringify": "^1.0.1"
+            "pify": "^4.0.1",
+            "semver": "^5.6.0"
           }
         },
-        "assert-plus": {
-          "version": "0.2.0",
-          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz",
-          "integrity": "sha1-104bh+ev/A24qttwIfP+SBAasjQ=",
-          "dev": true,
-          "optional": true
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-        "aws-sign2": {
-          "version": "0.6.0",
-          "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz",
-          "integrity": "sha1-FDQt0428yU0OW4fXY81jYSwOeU8=",
-          "dev": true,
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-          "dev": true,
-          "optional": true,
-          "requires": {
-            "asynckit": "^0.4.0",
-            "combined-stream": "^1.0.5",
-            "mime-types": "^2.1.12"
-          }
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-          "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-1.0.5.tgz",
-          "integrity": "sha1-0mMTX0MwfALGAq/I/pWXDAFRNp4=",
+        "pify": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
+          "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
           "dev": true,
           "optional": true
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-          "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-4.2.1.tgz",
-          "integrity": "sha1-M0gdDxu/9gDdID11gSpqX7oALio=",
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "ajv": "^4.9.1",
-            "har-schema": "^1.0.5"
-          }
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-        "http-signature": {
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-          "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.1.1.tgz",
-          "integrity": "sha1-33LiZwZs0Kxn+3at+OE0qPvPkb8=",
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "assert-plus": "^0.2.0",
-            "jsprim": "^1.2.2",
-            "sshpk": "^1.7.0"
-          }
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-        "json-stable-stringify": {
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-          "resolved": "https://registry.npmjs.org/json-stable-stringify/-/json-stable-stringify-1.0.1.tgz",
-          "integrity": "sha1-mnWdOcXy/1A/1TAGRu1EX4jE+a8=",
-          "dev": true,
-          "optional": true,
-          "requires": {
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-          }
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-        "performance-now": {
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-          "integrity": "sha1-M+8wxcd9TqIcWlOGnZG1bY8lVeU=",
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
           "dev": true,
           "optional": true
         },
-        "qs": {
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-          "resolved": "https://registry.npmjs.org/qs/-/qs-6.4.0.tgz",
-          "integrity": "sha1-E+JtKK1rD/qpExLNO/cI7TUecjM=",
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
           "dev": true,
           "optional": true
         },
-        "request": {
-          "version": "2.81.0",
-          "resolved": "https://registry.npmjs.org/request/-/request-2.81.0.tgz",
-          "integrity": "sha1-xpKJRqDgbF+Nb4qTM0af/aRimKA=",
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "aws-sign2": "~0.6.0",
-            "aws4": "^1.2.1",
-            "caseless": "~0.12.0",
-            "combined-stream": "~1.0.5",
-            "extend": "~3.0.0",
-            "forever-agent": "~0.6.1",
-            "form-data": "~2.1.1",
-            "har-validator": "~4.2.1",
-            "hawk": "~3.1.3",
-            "http-signature": "~1.1.0",
-            "is-typedarray": "~1.0.0",
-            "isstream": "~0.1.2",
-            "json-stringify-safe": "~5.0.1",
-            "mime-types": "~2.1.7",
-            "oauth-sign": "~0.8.1",
-            "performance-now": "^0.2.0",
-            "qs": "~6.4.0",
-            "safe-buffer": "^5.0.1",
-            "stringstream": "~0.0.4",
-            "tough-cookie": "~2.3.0",
-            "tunnel-agent": "^0.6.0",
-            "uuid": "^3.0.0"
-          }
+        "tslib": {
+          "version": "1.13.0",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.13.0.tgz",
+          "integrity": "sha512-i/6DQjL8Xf3be4K/E6Wgpekn5Qasl1usyw++dAA35Ue5orEn65VIxOA+YvNNl9HV3qv70T7CNwjODHZrLwvd1Q==",
+          "dev": true
         }
       }
     },
     "less-loader": {
-      "version": "4.0.5",
-      "resolved": "https://registry.npmjs.org/less-loader/-/less-loader-4.0.5.tgz",
-      "integrity": "sha1-rhVadAbKxqzSk9eFWH/P8PR4xN0=",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/less-loader/-/less-loader-4.1.0.tgz",
+      "integrity": "sha512-KNTsgCE9tMOM70+ddxp9yyt9iHqgmSs0yTZc5XH5Wo+g80RWRIYNqE58QJKm/yMud5wZEvz50ugRDuzVIkyahg==",
       "dev": true,
       "requires": {
         "clone": "^2.1.1",
         "loader-utils": "^1.1.0",
-        "pify": "^2.3.0"
+        "pify": "^3.0.0"
       },
       "dependencies": {
         "clone": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.1.tgz",
-          "integrity": "sha1-0hfR6WERjjrJpLi7oyhVU79kfNs=",
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.2.tgz",
+          "integrity": "sha1-G39Ln1kfHo+DZwQBYANFoCiHQ18=",
+          "dev": true
+        },
+        "pify": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-3.0.0.tgz",
+          "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
           "dev": true
         }
       }
@@ -12822,6 +12744,13 @@
         }
       }
     },
+    "native-request": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/native-request/-/native-request-1.0.7.tgz",
+      "integrity": "sha512-9nRjinI9bmz+S7dgNtf4A70+/vPhnd+2krGpy4SUlADuOuSa24IDkNaZ+R/QT1wQ6S8jBdi6wE7fLekFZNfUpQ==",
+      "dev": true,
+      "optional": true
+    },
     "natural-compare": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/natural-compare/-/natural-compare-1.4.0.tgz",
@@ -12912,6 +12841,146 @@
         "less": "^2.6.1",
         "object-assign": "^4.0.1",
         "through2": "^2.0.1"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "4.11.8",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-4.11.8.tgz",
+          "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "co": "^4.6.0",
+            "json-stable-stringify": "^1.0.1"
+          }
+        },
+        "assert-plus": {
+          "version": "0.2.0",
+          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz",
+          "integrity": "sha1-104bh+ev/A24qttwIfP+SBAasjQ=",
+          "dev": true,
+          "optional": true
+        },
+        "aws-sign2": {
+          "version": "0.6.0",
+          "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz",
+          "integrity": "sha1-FDQt0428yU0OW4fXY81jYSwOeU8=",
+          "dev": true,
+          "optional": true
+        },
+        "form-data": {
+          "version": "2.1.4",
+          "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.1.4.tgz",
+          "integrity": "sha1-M8GDrPGTJ27KqYFDpp6Uv+4XUNE=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "asynckit": "^0.4.0",
+            "combined-stream": "^1.0.5",
+            "mime-types": "^2.1.12"
+          }
+        },
+        "har-schema": {
+          "version": "1.0.5",
+          "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-1.0.5.tgz",
+          "integrity": "sha1-0mMTX0MwfALGAq/I/pWXDAFRNp4=",
+          "dev": true,
+          "optional": true
+        },
+        "har-validator": {
+          "version": "4.2.1",
+          "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-4.2.1.tgz",
+          "integrity": "sha1-M0gdDxu/9gDdID11gSpqX7oALio=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "ajv": "^4.9.1",
+            "har-schema": "^1.0.5"
+          }
+        },
+        "http-signature": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.1.1.tgz",
+          "integrity": "sha1-33LiZwZs0Kxn+3at+OE0qPvPkb8=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "assert-plus": "^0.2.0",
+            "jsprim": "^1.2.2",
+            "sshpk": "^1.7.0"
+          }
+        },
+        "json-stable-stringify": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/json-stable-stringify/-/json-stable-stringify-1.0.1.tgz",
+          "integrity": "sha1-mnWdOcXy/1A/1TAGRu1EX4jE+a8=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "jsonify": "~0.0.0"
+          }
+        },
+        "less": {
+          "version": "2.7.3",
+          "resolved": "https://registry.npmjs.org/less/-/less-2.7.3.tgz",
+          "integrity": "sha512-KPdIJKWcEAb02TuJtaLrhue0krtRLoRoo7x6BNJIBelO00t/CCdJQUnHW5V34OnHMWzIktSalJxRO+FvytQlCQ==",
+          "dev": true,
+          "requires": {
+            "errno": "^0.1.1",
+            "graceful-fs": "^4.1.2",
+            "image-size": "~0.5.0",
+            "mime": "^1.2.11",
+            "mkdirp": "^0.5.0",
+            "promise": "^7.1.1",
+            "request": "2.81.0",
+            "source-map": "^0.5.3"
+          }
+        },
+        "performance-now": {
+          "version": "0.2.0",
+          "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-0.2.0.tgz",
+          "integrity": "sha1-M+8wxcd9TqIcWlOGnZG1bY8lVeU=",
+          "dev": true,
+          "optional": true
+        },
+        "qs": {
+          "version": "6.4.0",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.4.0.tgz",
+          "integrity": "sha1-E+JtKK1rD/qpExLNO/cI7TUecjM=",
+          "dev": true,
+          "optional": true
+        },
+        "request": {
+          "version": "2.81.0",
+          "resolved": "https://registry.npmjs.org/request/-/request-2.81.0.tgz",
+          "integrity": "sha1-xpKJRqDgbF+Nb4qTM0af/aRimKA=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "aws-sign2": "~0.6.0",
+            "aws4": "^1.2.1",
+            "caseless": "~0.12.0",
+            "combined-stream": "~1.0.5",
+            "extend": "~3.0.0",
+            "forever-agent": "~0.6.1",
+            "form-data": "~2.1.1",
+            "har-validator": "~4.2.1",
+            "hawk": "~3.1.3",
+            "http-signature": "~1.1.0",
+            "is-typedarray": "~1.0.0",
+            "isstream": "~0.1.2",
+            "json-stringify-safe": "~5.0.1",
+            "mime-types": "~2.1.7",
+            "oauth-sign": "~0.8.1",
+            "performance-now": "^0.2.0",
+            "qs": "~6.4.0",
+            "safe-buffer": "^5.0.1",
+            "stringstream": "~0.0.4",
+            "tough-cookie": "~2.3.0",
+            "tunnel-agent": "^0.6.0",
+            "uuid": "^3.0.0"
+          }
+        }
       }
     },
     "node-libs-browser": {
diff --git a/package.json b/package.json
index 7e96e191e..f06d94616 100644
--- a/package.json
+++ b/package.json
@@ -81,8 +81,8 @@
     "eslint-config-dabapps": "^5.0.0",
     "http-server": "^0.11.1",
     "jest": "^22.4.2",
-    "less": "^2.7.3",
-    "less-loader": "^4.0.5",
+    "less": "^3.12.2",
+    "less-loader": "^4.1.0",
     "lesshint": "^3.3.1",
     "livereload": "^0.8.2",
     "node-lessify": "^0.1.5",
@@ -103,11 +103,11 @@
     "webpack": "^3.7.1"
   },
   "peerDependencies": {
-    "less": "^2.7.3",
-    "normalize.css": "^8.0.1",
+    "less": "3",
+    "normalize.css": "8",
     "react": ">= 15",
     "react-dom": ">= 15",
-    "react-transition-group": ">= 1 < 2"
+    "react-transition-group": "1"
   },
   "jest": {
     "collectCoverageFrom": [
diff --git a/src/less/modals.less b/src/less/modals.less
index 2a9a71b23..b437261c9 100644
--- a/src/less/modals.less
+++ b/src/less/modals.less
@@ -79,7 +79,7 @@
     .modal {
       display: flex;
       flex-direction: column;
-      max-height: ~'calc(100vh - @{modal-margin-vertical-double})';
+      max-height: calc(100vh - @modal-margin-vertical-double);
     }
 
     .modal-body {
diff --git a/src/less/overrides.less b/src/less/overrides.less
index ade924b63..bde3db559 100644
--- a/src/less/overrides.less
+++ b/src/less/overrides.less
@@ -226,7 +226,7 @@ input[type='radio'] {
   </svg>
 */
 @select-arrows-background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI4IiBoZWlnaHQ9IjE0IiB2aWV3Qm94PSIwIDAgOCAxNCI+PHBhdGggZD0iTSA0IDAgOCA1IDAgNSB6Ii8+PHBhdGggZD0iTSAwIDkgOCA5IDQgMTQgeiIvPjwvc3ZnPgo='); // lesshint maxCharPerLine: false
-@select-arrows-position: ~'calc(100% - @{select-arrows-offset})' 50%;
+@select-arrows-position: calc(100% - @select-arrows-offset) 50%;