diff --git a/package.json b/package.json
index 07248ab8..0f36639c 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
         "@silvermine/videojs-quality-selector": "^1.2.4",
         "core-js": "^3.8.2",
         "css-loader": "^5.0.1",
-        "less": "3.12.2",
+        "less": "4.0.0",
         "less-loader": "^7.2.1",
         "register-service-worker": "^1.7.1",
         "uikit": "3.6.9",
diff --git a/yarn.lock b/yarn.lock
index 436f0d40..957a4c77 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2842,6 +2842,13 @@ cookie@0.4.0:
   resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.0.tgz#beb437e7022b3b6d49019d088665303ebe9c14ba"
   integrity sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg==
 
+copy-anything@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/copy-anything/-/copy-anything-2.0.1.tgz#2afbce6da684bdfcbec93752fa762819cb480d9a"
+  integrity sha512-lA57e7viQHOdPQcrytv5jFeudZZOXuyk47lZym279FiDQ8jeZomXiGuVf6ffMKkJ+3TIai3J1J3yi6M+/4U35g==
+  dependencies:
+    is-what "^3.7.1"
+
 copy-concurrently@^1.0.0:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/copy-concurrently/-/copy-concurrently-1.0.5.tgz#92297398cae34937fcafd6ec8139c18051f0b5e0"
@@ -5193,6 +5200,11 @@ is-typedarray@~1.0.0:
   resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"
   integrity sha1-5HnICFjfDBsR3dppQPlgEfzaSpo=
 
+is-what@^3.7.1:
+  version "3.12.0"
+  resolved "https://registry.yarnpkg.com/is-what/-/is-what-3.12.0.tgz#f4405ce4bd6dd420d3ced51a026fb90e03705e55"
+  integrity sha512-2ilQz5/f/o9V7WRWJQmpFYNmQFZ9iM+OXRonZKcYgTkCzjb949Vi4h282PD1UfmgHk666rcWonbRJ++KI41VGw==
+
 is-windows@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"
@@ -5436,11 +5448,13 @@ less-loader@^7.2.1:
     loader-utils "^2.0.0"
     schema-utils "^3.0.0"
 
-less@3.12.2:
-  version "3.12.2"
-  resolved "https://registry.yarnpkg.com/less/-/less-3.12.2.tgz#157e6dd32a68869df8859314ad38e70211af3ab4"
-  integrity sha512-+1V2PCMFkL+OIj2/HrtrvZw0BC0sYLMICJfbQjuj/K8CEnlrFX6R5cKKgzzttsZDHyxQNL1jqMREjKN3ja/E3Q==
+less@4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/less/-/less-4.0.0.tgz#d238cc25576c1f722794dbca4ac82e5e3c7e9e65"
+  integrity sha512-av1eEa2D0xZfF7fjLJS/Dld7zAYSLU7EOEJvuOELeaNI3i6L/81AdjbK5/pytaRkBwi7ZEa0433IDvMLskKCOw==
   dependencies:
+    copy-anything "^2.0.1"
+    parse-node-version "^1.0.1"
     tslib "^1.10.0"
   optionalDependencies:
     errno "^0.1.1"
@@ -6440,6 +6454,11 @@ parse-json@^5.0.0:
     json-parse-even-better-errors "^2.3.0"
     lines-and-columns "^1.1.6"
 
+parse-node-version@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/parse-node-version/-/parse-node-version-1.0.1.tgz#e2b5dbede00e7fa9bc363607f53327e8b073189b"
+  integrity sha512-3YHlOa/JgH6Mnpr05jP9eDG254US9ek25LyIxZlDItp2iJtwyaXQb57lBYLdT3MowkUFYEV2XXNAYIPlESvJlA==
+
 parse5-htmlparser2-tree-adapter@^6.0.0:
   version "6.0.1"
   resolved "https://registry.yarnpkg.com/parse5-htmlparser2-tree-adapter/-/parse5-htmlparser2-tree-adapter-6.0.1.tgz#2cdf9ad823321140370d4dbf5d3e92c7c8ddc6e6"