diff --git a/package.json b/package.json
index cb14fd19..c1a27978 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
 		"knockout-postbox": "0.6.1",
 		"knockout-sortable": "1.3.0",
 		"knockout.validation": "2.0.4",
-		"less": "4.5.1",
+		"less": "4.6.3",
 		"lie": "3.3.0",
 		"lightbox2": "2.12.0",
 		"moment": "2.30.1",
diff --git a/yarn.lock b/yarn.lock
index 82a2a49f..a41182f7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1771,12 +1771,12 @@ convert-source-map@^2.0.0:
   resolved "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz"
   integrity sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==
 
-copy-anything@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.npmjs.org/copy-anything/-/copy-anything-2.0.1.tgz"
-  integrity sha512-lA57e7viQHOdPQcrytv5jFeudZZOXuyk47lZym279FiDQ8jeZomXiGuVf6ffMKkJ+3TIai3J1J3yi6M+/4U35g==
+copy-anything@^3.0.5:
+  version "3.0.5"
+  resolved "https://registry.yarnpkg.com/copy-anything/-/copy-anything-3.0.5.tgz#2d92dce8c498f790fa7ad16b01a1ae5a45b020a0"
+  integrity sha512-yCEafptTtb4bk7GLEQoM8KVJpxAfdBJYaXyzQEgQQQgYrZiDp8SJmGKlYza6CYjEDNstAdNdKA3UuoULlEbS6w==
   dependencies:
-    is-what "^3.7.1"
+    is-what "^4.1.8"
 
 copy-props@^4.0.0:
   version "4.0.0"
@@ -3542,10 +3542,10 @@ is-valid-glob@^1.0.0:
   resolved "https://registry.npmjs.org/is-valid-glob/-/is-valid-glob-1.0.0.tgz"
   integrity sha1-Kb8+/3Ab4tTTFdusw5vDn+j2Aao=
 
-is-what@^3.7.1:
-  version "3.12.0"
-  resolved "https://registry.npmjs.org/is-what/-/is-what-3.12.0.tgz"
-  integrity sha512-2ilQz5/f/o9V7WRWJQmpFYNmQFZ9iM+OXRonZKcYgTkCzjb949Vi4h282PD1UfmgHk666rcWonbRJ++KI41VGw==
+is-what@^4.1.8:
+  version "4.1.16"
+  resolved "https://registry.yarnpkg.com/is-what/-/is-what-4.1.16.tgz#1ad860a19da8b4895ad5495da3182ce2acdd7a6f"
+  integrity sha512-ZhMwEosbFJkA0YhFnNDgTM4ZxDRsS6HqTo7qsZM08fehyRYIYa0yHu5R6mgo1n/8MgaPBXiPimPD77baVFYg+A==
 
 is-windows@^1.0.1:
   version "1.0.2"
@@ -3833,14 +3833,13 @@ lead@^4.0.0:
   resolved "https://registry.npmjs.org/lead/-/lead-4.0.0.tgz"
   integrity sha512-DpMa59o5uGUWWjruMp71e6knmwKU3jRBBn1kjuLWN9EeIOxNeSAwvHf03WIl8g/ZMR2oSQC9ej3yeLBwdDc/pg==
 
-less@4.5.1:
-  version "4.5.1"
-  resolved "https://registry.yarnpkg.com/less/-/less-4.5.1.tgz#739266532249a3de232e8b60ffb1b27ad5ec6ad8"
-  integrity sha512-UKgI3/KON4u6ngSsnDADsUERqhZknsVZbnuzlRZXLQCmfC/MDld42fTydUE9B+Mla1AL6SJ/Pp6SlEFi/AVGfw==
+less@4.6.3:
+  version "4.6.3"
+  resolved "https://registry.yarnpkg.com/less/-/less-4.6.3.tgz#0f7de4ad72d12ad2c2b33f21a9e42c1a6a4716af"
+  integrity sha512-xxjVIiz0rvWAhx49t8YLA/Dj6Uig4XdJgTRI5hbYHGmiDSh+S8hi2Wxsed2trjl/uur4kbW2+e2a8Mrk9Rcgbw==
   dependencies:
-    copy-anything "^2.0.1"
+    copy-anything "^3.0.5"
     parse-node-version "^1.0.1"
-    tslib "^2.3.0"
   optionalDependencies:
     errno "^0.1.1"
     graceful-fs "^4.1.2"
@@ -6361,7 +6360,7 @@ treeverse@^3.0.0:
   resolved "https://registry.npmjs.org/treeverse/-/treeverse-3.0.0.tgz"
   integrity sha512-gcANaAnd2QDZFmHFEOF4k7uc1J/6a6z3DJMd/QwEyxLoKGiptJRwid582r7QIsFlFMIZ3SnxfS52S4hm2DHkuQ==
 
-tslib@^2.1.0, tslib@^2.3.0:
+tslib@^2.1.0:
   version "2.4.1"
   resolved "https://registry.npmjs.org/tslib/-/tslib-2.4.1.tgz"
   integrity sha512-tGyy4dAjRIEwI7BzsB0lynWgOpfqjUdq91XXAlIWD2OwKBH7oCl/GZG/HT4BOHrTlPMOASlMQ7veyTqpmRcrNA==