diff --git a/CHANGELOG.yaml b/CHANGELOG.yaml
index 17359f1a..181018fa 100644
--- a/CHANGELOG.yaml
+++ b/CHANGELOG.yaml
@@ -5,6 +5,7 @@ unreleased:
     - GH-1032 Enhanced performance when operating on buffers in Node environment
     - GH-1035 Added missing buffer APIs to expose a uniform interface across environments
     - GH-1049 Replaced shims for atob and btoa with native implementations
+    - GH-1050 Deprecated `atob`, `btoa`, `backbone`, 'crypto-js' and `tv4` libraries
 
 5.1.1:
   date: 2024-08-01
diff --git a/lib/sandbox/execute-context.js b/lib/sandbox/execute-context.js
index 0932091c..d8323221 100644
--- a/lib/sandbox/execute-context.js
+++ b/lib/sandbox/execute-context.js
@@ -1,6 +1,14 @@
 const { isNonLegacySandbox } = require('./non-legacy-codemarkers');
 const _ = require('lodash'),
-    legacy = require('./postman-legacy-interface');
+    legacy = require('./postman-legacy-interface'),
+
+    DEPRECATED_LIBS = {
+        atob: 'global "atob" function',
+        btoa: 'global "btoa" function',
+        'crypto-js': 'global "crypto" object',
+        tv4: '"ajv" library',
+        backbone: null
+    };
 
 module.exports = function (scope, code, execution, console, timers, pmapi, onAssertion, options) {
     // if there is no code, then no point bubbling anything up
@@ -42,7 +50,18 @@ module.exports = function (scope, code, execution, console, timers, pmapi, onAss
         setImmediate: timers.setImmediate,
         clearTimeout: timers.clearTimeout,
         clearInterval: timers.clearInterval,
-        clearImmediate: timers.clearImmediate
+        clearImmediate: timers.clearImmediate,
+
+        require: (...args) => {
+            const key = args?.[0],
+                alt = DEPRECATED_LIBS[key];
+
+            if (alt !== undefined) {
+                console.warn(`Using "${key}" library is deprecated.${alt !== null ? ` Use ${alt} instead.` : ''}`);
+            }
+
+            return require(...args);
+        }
     });
 
     scope.exec(code, { async: true }, function (err) {
diff --git a/lib/sandbox/postman-legacy-interface.js b/lib/sandbox/postman-legacy-interface.js
index fc81ce62..5f356d4f 100644
--- a/lib/sandbox/postman-legacy-interface.js
+++ b/lib/sandbox/postman-legacy-interface.js
@@ -20,34 +20,33 @@ const _ = require('lodash'),
     ],
 
     LEGACY_GLOBS_ALTERNATIVES = {
-        tests: 'pm.test()',
-        globals: 'pm.globals',
-        environment: 'pm.environment',
-        data: 'pm.iterationData',
-        request: 'pm.request',
-        responseCookies: 'pm.cookies',
-        responseHeaders: 'pm.response.headers',
-        responseTime: 'pm.response.responseTime',
-        responseCode: 'pm.response.code',
-        responseBody: 'pm.response.text()',
-        iteration: 'pm.info.iteration',
-        _: 'require(\'lodash\')',
-        CryptoJS: 'require(\'crypto-js\')',
-        tv4: 'require(\'ajv\')',
-        xml2Json: 'require(\'xml2js\')',
-        Backbone: 'require(\'backbone\')',
-        cheerio: 'require(\'cheerio\')',
-        'postman.setNextRequest': 'pm.execution.setNextRequest()',
-        'postman.setEnvironmentVariable': 'pm.environment.set()',
-        'postman.getEnvironmentVariable': 'pm.environment.get()',
-        'postman.clearEnvironmentVariables': 'pm.environment.clear()',
-        'postman.clearEnvironmentVariable': 'pm.environment.unset()',
-        'postman.setGlobalVariable': 'pm.globals.set()',
-        'postman.getGlobalVariable': 'pm.globals.get()',
-        'postman.clearGlobalVariables': 'pm.globals.clear()',
-        'postman.clearGlobalVariable': 'pm.globals.unset()',
-        'postman.getResponseCookie': 'pm.cookies.get()',
-        'postman.getResponseHeader': 'pm.response.headers.get()'
+        tests: '"pm.test()"',
+        globals: '"pm.globals"',
+        environment: '"pm.environment"',
+        data: '"pm.iterationData"',
+        request: '"pm.request"',
+        responseCookies: '"pm.cookies"',
+        responseHeaders: '"pm.response.headers"',
+        responseTime: '"pm.response.responseTime"',
+        responseCode: '"pm.response.code"',
+        responseBody: '"pm.response.text()"',
+        iteration: '"pm.info.iteration"',
+        _: '"require(\'lodash\')"',
+        CryptoJS: 'global "crypto" object',
+        tv4: '"require(\'ajv\')"',
+        xml2Json: '"require(\'xml2js\')"',
+        cheerio: '"require(\'cheerio\')"',
+        'postman.setNextRequest': '"pm.execution.setNextRequest()"',
+        'postman.setEnvironmentVariable': '"pm.environment.set()"',
+        'postman.getEnvironmentVariable': '"pm.environment.get()"',
+        'postman.clearEnvironmentVariables': '"pm.environment.clear()"',
+        'postman.clearEnvironmentVariable': '"pm.environment.unset()"',
+        'postman.setGlobalVariable': '"pm.globals.set()"',
+        'postman.getGlobalVariable': '"pm.globals.get()"',
+        'postman.clearGlobalVariables': '"pm.globals.clear()"',
+        'postman.clearGlobalVariable': '"pm.globals.unset()"',
+        'postman.getResponseCookie': '"pm.cookies.get()"',
+        'postman.getResponseHeader': '"pm.response.headers.get()"'
     },
 
     E = '',
@@ -190,7 +189,7 @@ function logDeprecationWarning (key, legacyUsageSet, console) {
     legacyUsageSet.add(key);
 
     if (LEGACY_GLOBS_ALTERNATIVES[key]) {
-        console.warn(`Using "${key}" is deprecated. Use "${LEGACY_GLOBS_ALTERNATIVES[key]}" instead.`);
+        console.warn(`Using "${key}" is deprecated. Use ${LEGACY_GLOBS_ALTERNATIVES[key]} instead.`);
     }
     else if (LEGACY_GLOBS.includes(key)) {
         console.warn(`Using "${key}" is deprecated.`);
diff --git a/npm/utils/templates.js b/npm/utils/templates.js
index 1ffbc492..2f824501 100644
--- a/npm/utils/templates.js
+++ b/npm/utils/templates.js
@@ -93,17 +93,17 @@ declare var iteration;
 declare var _;
 
 /**
- * @deprecated Use require('crypto-js') instead
+ * @deprecated Use global "crypto" object instead
  */
 declare var CryptoJS;
 
 /**
- * @deprecated Use require('atob') instead
+ * @deprecated Use global "atob" function instead
  */
 declare var atob;
 
 /**
- * @deprecated Use require('btoa') instead
+ * @deprecated Use global "btoa" function instead
  */
 declare var btoa;
 
@@ -118,7 +118,7 @@ declare var tv4;
 declare var xml2Json;
 
 /**
- * @deprecated Use require('backbone') instead
+ * @deprecated
  */
 declare var Backbone;
 
diff --git a/test/unit/sandbox-libraries/deprecation.test.js b/test/unit/sandbox-libraries/deprecation.test.js
new file mode 100644
index 00000000..9668d7cc
--- /dev/null
+++ b/test/unit/sandbox-libraries/deprecation.test.js
@@ -0,0 +1,164 @@
+const env = require('../../../lib/environment'),
+    DEPRECATED_LIBS = ['atob', 'btoa', 'crypto-js', 'tv4', 'backbone'];
+
+describe('sandbox library - deprecation', function () {
+    this.timeout(1000 * 60);
+    var Sandbox = require('../../../'),
+        context;
+
+    beforeEach(function (done) {
+        Sandbox.createContext({}, function (err, ctx) {
+            context = ctx;
+            done(err);
+        });
+    });
+
+    afterEach(function () {
+        context.dispose();
+        context = null;
+    });
+
+    it('should show deprecation warning for "tv4"', function (done) {
+        const consoleSpy = sinon.spy();
+
+        context.on('console', consoleSpy);
+        context.execute(`
+          const requiredTv4 = require('tv4');
+          tv4.validate;
+        `, function (err) {
+            if (err) {
+                return done(err);
+            }
+
+            expect(consoleSpy).to.be.calledTwice;
+
+            expect(consoleSpy.firstCall.args[1]).to.equal('warn');
+            expect(consoleSpy.firstCall.args[2])
+                .to.equal('Using "tv4" library is deprecated. Use "ajv" library instead.');
+
+            expect(consoleSpy.secondCall.args[1]).to.equal('warn');
+            expect(consoleSpy.secondCall.args[2])
+                .to.equal('Using "tv4" is deprecated. Use "require(\'ajv\')" instead.');
+
+            done();
+        });
+    });
+
+    it('should show deprecation warning for "crypto-js"', function (done) {
+        const consoleSpy = sinon.spy();
+
+        context.on('console', consoleSpy);
+        context.execute(`
+          const requiredCryptoJS = require('crypto-js');
+          CryptoJS.lib;
+        `, function (err) {
+            if (err) {
+                return done(err);
+            }
+
+            expect(consoleSpy).to.be.calledTwice;
+
+            expect(consoleSpy.firstCall.args[1]).to.equal('warn');
+            expect(consoleSpy.firstCall.args[2])
+                .to.equal('Using "crypto-js" library is deprecated. Use global "crypto" object instead.');
+
+            expect(consoleSpy.secondCall.args[1]).to.equal('warn');
+            expect(consoleSpy.secondCall.args[2])
+                .to.equal('Using "CryptoJS" is deprecated. Use global "crypto" object instead.');
+
+            done();
+        });
+    });
+
+
+    it('should show deprecation warning for "backbone', function (done) {
+        const consoleSpy = sinon.spy();
+
+        context.on('console', consoleSpy);
+        context.execute(`
+          const requiredBackbone = require('backbone');
+          Backbone.Backbone;
+        `, function (err) {
+            if (err) {
+                return done(err);
+            }
+
+            expect(consoleSpy).to.be.calledTwice;
+
+            expect(consoleSpy.firstCall.args[1]).to.equal('warn');
+            expect(consoleSpy.firstCall.args[2])
+                .to.equal('Using "backbone" library is deprecated.');
+
+            expect(consoleSpy.secondCall.args[1]).to.equal('warn');
+            expect(consoleSpy.secondCall.args[2])
+                .to.equal('Using "Backbone" is deprecated.');
+
+            done();
+        });
+    });
+
+    it('should show deprecation warning for "atob', function (done) {
+        const consoleSpy = sinon.spy();
+
+        context.on('console', consoleSpy);
+        context.execute(`
+          const requiredAtob = require('atob');
+          atob('YQ==');
+        `, function (err) {
+            if (err) {
+                return done(err);
+            }
+
+            expect(consoleSpy).to.be.calledOnce;
+
+            expect(consoleSpy.firstCall.args[1]).to.equal('warn');
+            expect(consoleSpy.firstCall.args[2])
+                .to.equal('Using "atob" library is deprecated. Use global "atob" function instead.');
+
+            done();
+        });
+    });
+
+    it('should show deprecation warning for "btoa', function (done) {
+        const consoleSpy = sinon.spy();
+
+        context.on('console', consoleSpy);
+        context.execute(`
+          const requiredBtoa = require('btoa');
+          btoa('a');
+        `, function (err) {
+            if (err) {
+                return done(err);
+            }
+
+            expect(consoleSpy).to.be.calledOnce;
+
+            expect(consoleSpy.firstCall.args[1]).to.equal('warn');
+            expect(consoleSpy.firstCall.args[2])
+                .to.equal('Using "btoa" library is deprecated. Use global "btoa" function instead.');
+
+            done();
+        });
+    });
+
+    it('should not show warning for non-deprecated libraries', function (done) {
+        const consoleSpy = sinon.spy(),
+            libs = Object.entries(env.require).map(([key, value]) => {
+                return value.expose ?? key;
+            }),
+            code = libs.map((lib) => {
+                return !DEPRECATED_LIBS.includes(lib) ? `require('${lib}');` : '';
+            }).join('\n');
+
+
+        context.on('console', consoleSpy);
+        context.execute(code, function (err) {
+            if (err) {
+                return done(err);
+            }
+
+            expect(consoleSpy).to.not.be.called;
+            done();
+        });
+    });
+});
diff --git a/test/unit/sandbox-libraries/legacy.test.js b/test/unit/sandbox-libraries/legacy.test.js
index 97573438..7019522d 100644
--- a/test/unit/sandbox-libraries/legacy.test.js
+++ b/test/unit/sandbox-libraries/legacy.test.js
@@ -55,7 +55,7 @@ describe('sandbox library - legacy', function () {
 
         context.on('console', consoleSpy);
         context.execute(`
-           CryptoJS.AES.encrypt('my message', 'secret key 123')
+           cheerio.load('foo');
         `, function (err) {
             if (err) {
                 return done(err);
@@ -64,7 +64,7 @@ describe('sandbox library - legacy', function () {
             expect(consoleSpy).to.be.calledOnce;
             expect(consoleSpy.firstCall.args[1]).to.equal('warn');
             expect(consoleSpy.firstCall.args[2])
-                .to.equal('Using "CryptoJS" is deprecated. Use "require(\'crypto-js\')" instead.');
+                .to.equal('Using "cheerio" is deprecated. Use "require(\'cheerio\')" instead.');
             done();
         });
     });
diff --git a/types/index.d.ts b/types/index.d.ts
index f53c1603..7abf0ee2 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for postman-sandbox 5.0.0
+// Type definitions for postman-sandbox 5.1.1
 // Project: https://github.com/postmanlabs/postman-sandbox
 // Definitions by: PostmanLabs
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
diff --git a/types/sandbox/prerequest.d.ts b/types/sandbox/prerequest.d.ts
index 89088245..bec74afa 100644
--- a/types/sandbox/prerequest.d.ts
+++ b/types/sandbox/prerequest.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for postman-sandbox 5.0.0
+// Type definitions for postman-sandbox 5.1.1
 // Project: https://github.com/postmanlabs/postman-sandbox
 // Definitions by: PostmanLabs
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -55,17 +55,17 @@ declare var iteration;
 declare var _;
 
 /**
- * @deprecated Use require('crypto-js') instead
+ * @deprecated Use global "crypto" object instead
  */
 declare var CryptoJS;
 
 /**
- * @deprecated Use require('atob') instead
+ * @deprecated Use global "atob" function instead
  */
 declare var atob;
 
 /**
- * @deprecated Use require('btoa') instead
+ * @deprecated Use global "btoa" function instead
  */
 declare var btoa;
 
@@ -80,7 +80,7 @@ declare var tv4;
 declare var xml2Json;
 
 /**
- * @deprecated Use require('backbone') instead
+ * @deprecated
  */
 declare var Backbone;
 
diff --git a/types/sandbox/test.d.ts b/types/sandbox/test.d.ts
index d049859f..32861a26 100644
--- a/types/sandbox/test.d.ts
+++ b/types/sandbox/test.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for postman-sandbox 5.0.0
+// Type definitions for postman-sandbox 5.1.1
 // Project: https://github.com/postmanlabs/postman-sandbox
 // Definitions by: PostmanLabs
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -85,17 +85,17 @@ declare var iteration;
 declare var _;
 
 /**
- * @deprecated Use require('crypto-js') instead
+ * @deprecated Use global "crypto" object instead
  */
 declare var CryptoJS;
 
 /**
- * @deprecated Use require('atob') instead
+ * @deprecated Use global "atob" function instead
  */
 declare var atob;
 
 /**
- * @deprecated Use require('btoa') instead
+ * @deprecated Use global "btoa" function instead
  */
 declare var btoa;
 
@@ -110,7 +110,7 @@ declare var tv4;
 declare var xml2Json;
 
 /**
- * @deprecated Use require('backbone') instead
+ * @deprecated
  */
 declare var Backbone;