diff --git a/notNeededPackages.json b/notNeededPackages.json
index b8a48cefa0..975cba9b6a 100644
--- a/notNeededPackages.json
+++ b/notNeededPackages.json
@@ -1098,6 +1098,12 @@
             "sourceRepoURL": "https://github.com/sindresorhus/filenamify-url",
             "asOfVersion": "2.0.0"
         },
+        {
+            "libraryName": "filesize",
+            "typingsPackageName": "filesize",
+            "sourceRepoURL": "https://github.com/avoidwork/filesize.js",
+            "asOfVersion": "5.0.0"
+        },
         {
             "libraryName": "filter-console",
             "typingsPackageName": "filter-console",
diff --git a/types/filesize/filesize-tests.ts b/types/filesize/filesize-tests.ts
deleted file mode 100644
index aadc0542fa..0000000000
--- a/types/filesize/filesize-tests.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-import filesize = require("filesize");
-
-filesize(500);                        // "500 B"
-filesize(500, {bits: true});          // "4 Kb"
-filesize(265318, {base: 10});         // "265.32 kB"
-filesize(265318);                     // "259.1 KB"
-filesize(265318, {round: 0});         // "259 KB"
-filesize(265318, {output: "array"});  // [259.1, "KB"]
-filesize(265318, {output: "object"}); // {value: 259.1, suffix: "KB", symbol: "KB"}
-filesize(1, {symbols: {B: "Б"}});     // "1 Б"
-filesize(1024);                       // "1 KB"
-filesize(1024, {exponent: 0});        // "1024 B"
-filesize(1024, {output: "exponent"}); // 1
-filesize(265318, {standard: "iec"});  // "259.1 KiB"
-filesize(265318, {standard: "iec", fullform: true}); // "259.1 kibibytes"
-filesize(12, {fullform: true, fullforms: ["байтов"]});  // "12 байтов"
-filesize(265318, {separator: ","});   // "259,1 KB"
-filesize(265318, {locale: 'de-DE'});  // "259,1 KB"
-
-const size = filesize.partial({standard: "iec"});
-size(265318);
diff --git a/types/filesize/index.d.ts b/types/filesize/index.d.ts
deleted file mode 100644
index 95547f2897..0000000000
--- a/types/filesize/index.d.ts
+++ /dev/null
@@ -1,103 +0,0 @@
-// Type definitions for filesize 4.2
-// Project: https://github.com/avoidwork/filesize.js, https://filesizejs.com
-// Definitions by: Giedrius Grabauskas <https://github.com/GiedriusGrabauskas>
-//                 Renaud Chaput <https://github.com/renchap>
-//                 Roman Nuritdinov <https://github.com/Ky6uk>
-//                 Sam Hulick <https://github.com/ffxsam>
-// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-
-declare var fileSize: Filesize.Filesize;
-export = fileSize;
-export as namespace filesize;
-
-declare namespace Filesize {
-    interface SiJedecBits {
-        b?: string;
-        Kb?: string;
-        Mb?: string;
-        Gb?: string;
-        Tb?: string;
-        Pb?: string;
-        Eb?: string;
-        Zb?: string;
-        Yb?: string;
-    }
-
-    interface SiJedecBytes {
-        B?: string;
-        KB?: string;
-        MB?: string;
-        GB?: string;
-        TB?: string;
-        PB?: string;
-        EB?: string;
-        ZB?: string;
-        YB?: string;
-    }
-
-    type SiJedec = SiJedecBits & SiJedecBytes & { [name: string]: string };
-
-    interface Options {
-        /**
-         * Number base, default is 2
-         */
-        base?: number;
-        /**
-         * Enables bit sizes, default is false
-         */
-        bits?: boolean;
-        /**
-         * Specifies the SI suffix via exponent, e.g. 2 is MB for bytes, default is -1
-         */
-        exponent?: number;
-        /**
-         * Enables full form of unit of measure, default is false
-         */
-        fullform?: boolean;
-        /**
-         * Array of full form overrides, default is []
-         */
-        fullforms?: string[];
-        /**
-         * BCP 47 language tag to specify a locale, or true to use default locale, default is ""
-         */
-        locale?: string | boolean;
-        /**
-         * ECMA-402 number format option overrides, default is "{}"
-         */
-        localeOptions?: Intl.NumberFormatOptions;
-        /**
-         * Output of function (array, exponent, object, or string), default is string
-         */
-        output?: "array" | "exponent" | "object" | "string";
-        /**
-         * Decimal place, default is 2
-         */
-        round?: number;
-        /**
-         * Decimal separator character, default is `.`
-         */
-        separator?: string;
-        /**
-         * Character between the result and suffix, default is ` `
-         */
-        spacer?: string;
-        /**
-         * Standard unit of measure, can be iec or jedec, default is jedec; can be overruled by base
-         */
-        standard?: "iec" | "jedec";
-        /**
-         * Dictionary of SI/JEDEC symbols to replace for localization, defaults to english if no match is found
-         */
-        symbols?: SiJedec;
-        /**
-         *  Enables unix style human readable output, e.g ls -lh, default is false
-         */
-        unix?: boolean;
-    }
-
-    interface Filesize {
-        (bytes: number, options?: Options): string;
-        partial: (options: Options) => ((bytes: number) => string);
-    }
-}
diff --git a/types/filesize/tsconfig.json b/types/filesize/tsconfig.json
deleted file mode 100644
index 350e88d4ad..0000000000
--- a/types/filesize/tsconfig.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-    "compilerOptions": {
-        "module": "commonjs",
-        "lib": [
-            "es6"
-        ],
-        "noImplicitAny": true,
-        "noImplicitThis": true,
-        "strictNullChecks": false,
-        "strictFunctionTypes": true,
-        "baseUrl": "../",
-        "typeRoots": [
-            "../"
-        ],
-        "types": [],
-        "noEmit": true,
-        "forceConsistentCasingInFileNames": true
-    },
-    "files": [
-        "index.d.ts",
-        "filesize-tests.ts"
-    ]
-}
\ No newline at end of file
diff --git a/types/filesize/tslint.json b/types/filesize/tslint.json
deleted file mode 100644
index f93cf8562a..0000000000
--- a/types/filesize/tslint.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-    "extends": "dtslint/dt.json"
-}