diff --git a/types/postcss-less/index.d.ts b/types/postcss-less/index.d.ts
index 4551f6afa770c80..0a866793d57c584 100644
--- a/types/postcss-less/index.d.ts
+++ b/types/postcss-less/index.d.ts
@@ -1,7 +1,9 @@
-// Type definitions for postcss-less 3.1
+// Type definitions for postcss-less 4.0
 // Project: https://github.com/shellscape/postcss-less
 // Definitions by: Masafumi Koba <https://github.com/ybiquitous>
+//                 Daniel Cassidy <https://github.com/djcsdy>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// Minimum TypeScript Version: 3.7
 
 import * as postcss from 'postcss';
 
diff --git a/types/postcss-less/package.json b/types/postcss-less/package.json
index 6c875d983d35793..31797583aa77dcd 100644
--- a/types/postcss-less/package.json
+++ b/types/postcss-less/package.json
@@ -1,6 +1,6 @@
 {
   "private": true,
   "dependencies": {
-    "postcss": "^7.0.32"
+    "postcss": "^8.1.2"
   }
 }
diff --git a/types/postcss-less/postcss-less-tests.ts b/types/postcss-less/postcss-less-tests.ts
index 67658ab5c65bd2b..464aa038c08b18b 100644
--- a/types/postcss-less/postcss-less-tests.ts
+++ b/types/postcss-less/postcss-less-tests.ts
@@ -1,4 +1,4 @@
-import postcss = require('postcss');
+import postcss from 'postcss';
 import less = require('postcss-less');
 
 const lessCode = `
diff --git a/types/postcss-less/tsconfig.json b/types/postcss-less/tsconfig.json
index d9d0a32bb0444eb..827d8ced07c018d 100644
--- a/types/postcss-less/tsconfig.json
+++ b/types/postcss-less/tsconfig.json
@@ -1,8 +1,10 @@
 {
     "compilerOptions": {
         "module": "commonjs",
+        "target": "ES5",
         "lib": [
-            "es6"
+            "es6",
+            "ES2018.Promise"
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,