diff --git a/package-lock.json b/package-lock.json
index c5c985d2137f4..af97de8dc6244 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -75,7 +75,7 @@
 				"@wordpress/warning": "3.0.1",
 				"@wordpress/widgets": "4.0.6",
 				"@wordpress/wordcount": "4.0.1",
-				"backbone": "1.5.0",
+				"backbone": "1.6.0",
 				"clipboard": "2.0.11",
 				"core-js-url-browser": "3.6.4",
 				"element-closest": "^3.0.2",
@@ -10067,9 +10067,9 @@
 			"dev": true
 		},
 		"node_modules/backbone": {
-			"version": "1.5.0",
-			"resolved": "https://registry.npmjs.org/backbone/-/backbone-1.5.0.tgz",
-			"integrity": "sha512-RPKlstw5NW+rD2X4PnEnvgLhslRnXOugXw2iBloHkPMgOxvakP1/A+tZIGM3qCm8uvZeEf8zMm0uvcK1JwL+IA==",
+			"version": "1.6.0",
+			"resolved": "https://registry.npmjs.org/backbone/-/backbone-1.6.0.tgz",
+			"integrity": "sha512-13PUjmsgw/49EowNcQvfG4gmczz1ximTMhUktj0Jfrjth0MVaTxehpU+qYYX4MxnuIuhmvBLC6/ayxuAGnOhbA==",
 			"dependencies": {
 				"underscore": ">=1.8.3"
 			}
@@ -41569,9 +41569,9 @@
 			}
 		},
 		"backbone": {
-			"version": "1.5.0",
-			"resolved": "https://registry.npmjs.org/backbone/-/backbone-1.5.0.tgz",
-			"integrity": "sha512-RPKlstw5NW+rD2X4PnEnvgLhslRnXOugXw2iBloHkPMgOxvakP1/A+tZIGM3qCm8uvZeEf8zMm0uvcK1JwL+IA==",
+			"version": "1.6.0",
+			"resolved": "https://registry.npmjs.org/backbone/-/backbone-1.6.0.tgz",
+			"integrity": "sha512-13PUjmsgw/49EowNcQvfG4gmczz1ximTMhUktj0Jfrjth0MVaTxehpU+qYYX4MxnuIuhmvBLC6/ayxuAGnOhbA==",
 			"requires": {
 				"underscore": ">=1.8.3"
 			}
diff --git a/package.json b/package.json
index 7c55cb8bc1278..eedd555935c36 100644
--- a/package.json
+++ b/package.json
@@ -144,7 +144,7 @@
 		"@wordpress/warning": "3.0.1",
 		"@wordpress/widgets": "4.0.6",
 		"@wordpress/wordcount": "4.0.1",
-		"backbone": "1.5.0",
+		"backbone": "1.6.0",
 		"clipboard": "2.0.11",
 		"core-js-url-browser": "3.6.4",
 		"element-closest": "^3.0.2",
diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index 24a35a291911e..2852dc2431760 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -1040,7 +1040,7 @@ function wp_default_scripts( $scripts ) {
 	did_action( 'init' ) && $scripts->add_data( 'json2', 'conditional', 'lt IE 8' );
 
 	$scripts->add( 'underscore', "/wp-includes/js/underscore$dev_suffix.js", array(), '1.13.4', 1 );
-	$scripts->add( 'backbone', "/wp-includes/js/backbone$dev_suffix.js", array( 'underscore', 'jquery' ), '1.5.0', 1 );
+	$scripts->add( 'backbone', "/wp-includes/js/backbone$dev_suffix.js", array( 'underscore', 'jquery' ), '1.6.0', 1 );
 
 	$scripts->add( 'wp-util', "/wp-includes/js/wp-util$suffix.js", array( 'underscore', 'jquery' ), false, 1 );
 	did_action( 'init' ) && $scripts->localize(