diff --git a/README.md b/README.md
index 272a2f35..918e03f3 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,7 @@ with the provided Dockerfile.
 |`-b` or `--brotli`|When enabled it will serve `./public/some-file.js.br` in place of `./public/some-file.js` when a brotli compressed version of the file exists and the request accepts `br` encoding. If gzip is also enabled, it will try to serve brotli first. |`false`|
 |`-e` or `--ext`  |Default file extension if none supplied |`html` | 
 |`-s` or `--silent` |Suppress log messages from output  | |
+|`--coop` |Enable COOP via the `Cross-Origin-Opener-Policy` header  | |
 |`--cors` |Enable CORS via the `Access-Control-Allow-Origin` header  | |
 |`-H` or `--header` |Add an extra response header (can be used several times)  | |
 |`-o [path]` |Open browser window after starting the server. Optionally provide a URL path to open. e.g.: -o /other/dir/ | |
@@ -136,6 +137,7 @@ This is what should be output if successful:
 Starting up http-server, serving ./ through https
 
 http-server settings:
+COOP: disabled
 CORS: disabled
 Cache: 3600 seconds
 Connection Timeout: 120 seconds
diff --git a/bin/http-server b/bin/http-server
index a5b79f2f..3886615b 100755
--- a/bin/http-server
+++ b/bin/http-server
@@ -35,6 +35,8 @@ if (argv.h || argv.help) {
     '               If both brotli and gzip are enabled, brotli takes precedence',
     '  -e --ext     Default file extension if none supplied [none]',
     '  -s --silent  Suppress log messages from output',
+    '  --coop[=mode]   Enable COOP via the "Cross-Origin-Opener-Policy" header',
+    '                  Optionally provide COOP mode.',
     '  --cors[=headers]   Enable CORS via the "Access-Control-Allow-Origin" header',
     '                     Optionally provide CORS headers list separated by commas',
     '  -H',
@@ -173,6 +175,13 @@ function listen(port) {
     }
   }
 
+  if (argv.coop) {
+    options.coop = true;
+    if (typeof argv.coop === 'string') {
+      options.coopHeader = argv.coop;
+    }
+  }
+
   if (argv.cors) {
     options.cors = true;
     if (typeof argv.cors === 'string') {
@@ -236,6 +245,7 @@ function listen(port) {
 
     logger.info([
       chalk.yellow('\nhttp-server settings: '),
+      ([chalk.yellow('COOP: '), argv.coop ? chalk.cyan(argv.coop) : chalk.red('disabled')].join('')),
       ([chalk.yellow('CORS: '), argv.cors ? chalk.cyan(argv.cors) : chalk.red('disabled')].join('')),
       ([chalk.yellow('Cache: '), argv.c ? (argv.c === '-1' ? chalk.red('disabled') : chalk.cyan(argv.c + ' seconds')) : chalk.cyan('3600 seconds')].join('')),
       ([chalk.yellow('Connection Timeout: '), argv.t === '0' ? chalk.red('disabled') : (argv.t ? chalk.cyan(argv.t + ' seconds') : chalk.cyan('120 seconds'))].join('')),
diff --git a/doc/http-server.1 b/doc/http-server.1
index 1337c5a2..860192fd 100644
--- a/doc/http-server.1
+++ b/doc/http-server.1
@@ -57,6 +57,12 @@ Default file extension is none is provided.
 .BI \-s ", " \-\-silent
 Suppress log messages from output.
 
+.TP
+.BI \-\-coop " " [\fIMODE\fR]
+Enable COOP via the "Cross-Origin-Opener-Policy" header and sets
+the "Cross-Origin-Embedder-Policy" header to "require-corp".
+Optionally provide COOP mode which defaults to "same-origin".
+
 .TP
 .BI \-\-cors " " [\fIHEADERS\fR]
 Enable CORS via the "Access-Control-Allow-Origin" header.
diff --git a/lib/core/aliases.json b/lib/core/aliases.json
index 53a22a56..229a16d5 100644
--- a/lib/core/aliases.json
+++ b/lib/core/aliases.json
@@ -6,6 +6,7 @@
   "hidePermissions": ["hidePermissions", "hidepermissions", "hide-permissions"],
   "si": [ "si", "index" ],
   "handleError": [ "handleError", "handleerror" ],
+  "coop": [ "coop", "COOP" ],
   "cors": [ "cors", "CORS" ],
   "headers": [ "H", "header", "headers" ],
   "contentType": [ "contentType", "contenttype", "content-type" ],
diff --git a/lib/core/defaults.json b/lib/core/defaults.json
index d919f292..63a1a9aa 100644
--- a/lib/core/defaults.json
+++ b/lib/core/defaults.json
@@ -6,6 +6,7 @@
   "hidePermissions": false,
   "si": false,
   "cache": "max-age=3600",
+  "coop": false,
   "cors": false,
   "gzip": true,
   "brotli": false,
diff --git a/lib/core/opts.js b/lib/core/opts.js
index ec1b2cbc..097ab18b 100644
--- a/lib/core/opts.js
+++ b/lib/core/opts.js
@@ -117,6 +117,14 @@ module.exports = (opts) => {
       return false;
     });
 
+    aliases.coop.forEach((k) => {
+      if (isDeclared(k) && opts[k]) {
+        handleOptionsMethod = true;
+        headers['Cross-Origin-Opener-Policy'] = 'same-origin';
+        headers['Cross-Origin-Embedder-Policy'] = 'require-corp';
+      }
+    });
+
     aliases.cors.forEach((k) => {
       if (isDeclared(k) && opts[k]) {
         handleOptionsMethod = true;
diff --git a/lib/http-server.js b/lib/http-server.js
index 0e946ac7..2948510d 100644
--- a/lib/http-server.js
+++ b/lib/http-server.js
@@ -98,6 +98,11 @@ function HttpServer(options) {
     });
   }
 
+  if (options.coop) {
+    this.headers['Cross-Origin-Opener-Policy'] = options.coopHeader || 'same-origin';
+    this.headers['Cross-Origin-Embedder-Policy'] = 'require-corp';
+  }
+
   if (options.cors) {
     this.headers['Access-Control-Allow-Origin'] = '*';
     this.headers['Access-Control-Allow-Headers'] = 'Origin, X-Requested-With, Content-Type, Accept, Range';
diff --git a/test/coop.test.js b/test/coop.test.js
new file mode 100644
index 00000000..375df0cf
--- /dev/null
+++ b/test/coop.test.js
@@ -0,0 +1,118 @@
+'use strict';
+
+const test = require('tap').test;
+const server = require('../lib/core');
+const http = require('http');
+const path = require('path');
+const request = require('request');
+
+const root = path.join(__dirname, 'public');
+
+test('coop defaults to false', (t) => {
+  t.plan(4);
+
+  const httpServer = http.createServer(
+    server({
+      root,
+      autoIndex: true,
+      defaultExt: 'html',
+    })
+  );
+
+  httpServer.listen(() => {
+    const port = httpServer.address().port;
+    const uri = `http://localhost:${port}/subdir/index.html`;
+
+    request.get({ uri }, (err, res) => {
+      t.error(err);
+      t.equal(res.statusCode, 200);
+      t.type(res.headers['cross-origin-opener-policy'], 'undefined');
+      t.type(res.headers['cross-origin-embedder-policy'], 'undefined');
+    });
+  });
+  t.once('end', () => {
+    httpServer.close();
+  });
+});
+
+test('coop set to false', (t) => {
+  t.plan(4);
+
+  const httpServer = http.createServer(
+    server({
+      root,
+      coop: false,
+      autoIndex: true,
+      defaultExt: 'html',
+    })
+  );
+
+  httpServer.listen(() => {
+    const port = httpServer.address().port;
+    const uri = `http://localhost:${port}/subdir/index.html`;
+
+    request.get({ uri }, (err, res) => {
+      t.error(err);
+      t.equal(res.statusCode, 200);
+      t.type(res.headers['cross-origin-opener-policy'], 'undefined');
+      t.type(res.headers['cross-origin-embedder-policy'], 'undefined');
+    });
+  });
+  t.once('end', () => {
+    httpServer.close();
+  });
+});
+
+test('coop set to true', (t) => {
+  t.plan(4);
+
+  const httpServer = http.createServer(
+    server({
+      root,
+      coop: true,
+      autoIndex: true,
+      defaultExt: 'html',
+    })
+  );
+
+  httpServer.listen(() => {
+    const port = httpServer.address().port;
+    const uri = `http://localhost:${port}/subdir/index.html`;
+    request.get({ uri }, (err, res) => {
+      t.error(err);
+      t.equal(res.statusCode, 200);
+      t.equal(res.headers['cross-origin-opener-policy'], 'same-origin');
+      t.equal(res.headers['cross-origin-embedder-policy'], 'require-corp');
+    });
+  });
+  t.once('end', () => {
+    httpServer.close();
+  });
+});
+
+test('COOP set to true', (t) => {
+  t.plan(4);
+
+  const httpServer = http.createServer(
+    server({
+      root,
+      COOP: true,
+      autoIndex: true,
+      defaultExt: 'html',
+    })
+  );
+
+  httpServer.listen(() => {
+    const port = httpServer.address().port;
+    const uri = `http://localhost:${port}/subdir/index.html`;
+    request.get({ uri }, (err, res) => {
+      t.error(err);
+      t.equal(res.statusCode, 200);
+      t.equal(res.headers['cross-origin-opener-policy'], 'same-origin');
+      t.equal(res.headers['cross-origin-embedder-policy'], 'require-corp');
+    });
+  });
+  t.once('end', () => {
+    httpServer.close();
+  });
+});
diff --git a/test/main.test.js b/test/main.test.js
index 3e3e4a63..fde6d423 100644
--- a/test/main.test.js
+++ b/test/main.test.js
@@ -26,6 +26,7 @@ test('http-server main', (t) => {
           'Access-Control-Allow-Origin': '*',
           'Access-Control-Allow-Credentials': 'true'
         },
+        coop: true,
         cors: true,
         corsHeaders: 'X-Test',
         ext: true,
@@ -63,6 +64,8 @@ test('http-server main', (t) => {
               // Custom headers
               t.equal(res.headers['access-control-allow-origin'], '*');
               t.equal(res.headers['access-control-allow-credentials'], 'true');
+              t.equal(res.headers['cross-origin-opener-policy'], 'same-origin');
+              t.equal(res.headers['cross-origin-embedder-policy'], 'require-corp');
             }).catch(err => t.fail(err.toString())),
 
             // Get robots