diff --git a/package-lock.json b/package-lock.json
index debd961c..193821dd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,14 +7,14 @@
 			"name": "UniversalLanguageSelector",
 			"devDependencies": {
 				"@wikimedia/codex-design-tokens": "1.7.0",
-				"eslint-config-wikimedia": "0.28.0",
+				"eslint-config-wikimedia": "0.28.2",
 				"grunt": "1.6.1",
 				"grunt-banana-checker": "0.13.0",
 				"grunt-eslint": "24.3.0",
-				"grunt-stylelint": "0.20.0",
+				"grunt-stylelint": "0.20.1",
 				"postcss-less": "6.0.0",
 				"sfnt2woff": "^1.0.1",
-				"stylelint-config-wikimedia": "0.17.1",
+				"stylelint-config-wikimedia": "0.17.2",
 				"svgo": "3.2.0"
 			}
 		},
@@ -1540,9 +1540,9 @@
 			}
 		},
 		"node_modules/eslint-config-wikimedia": {
-			"version": "0.28.0",
-			"resolved": "https://registry.npmjs.org/eslint-config-wikimedia/-/eslint-config-wikimedia-0.28.0.tgz",
-			"integrity": "sha512-qDkELhXoDvQP+kYYo5MilhvqJ4Agk78Pzu95K1l1h68xPEWagD4k/dvrgmVyKjcp5KyAnZr++7qChLiFhDdBDA==",
+			"version": "0.28.2",
+			"resolved": "https://registry.npmjs.org/eslint-config-wikimedia/-/eslint-config-wikimedia-0.28.2.tgz",
+			"integrity": "sha512-5+rdnT7wH1gpKAO6tHYThg78eMhZMruJzvqku3Y5iaEY/A7kSKLFpA/vOj/snys9fKjDHC9BXmArQh+agkOoJQ==",
 			"dev": true,
 			"dependencies": {
 				"browserslist-config-wikimedia": "^0.7.0",
@@ -1555,7 +1555,7 @@
 				"eslint-plugin-mediawiki": "^0.7.0",
 				"eslint-plugin-mocha": "^10.4.3",
 				"eslint-plugin-n": "^17.7.0",
-				"eslint-plugin-no-jquery": "^2.7.0",
+				"eslint-plugin-no-jquery": "^3.0.1",
 				"eslint-plugin-qunit": "^8.1.1",
 				"eslint-plugin-security": "^1.7.1",
 				"eslint-plugin-unicorn": "^53.0.0",
@@ -1759,12 +1759,12 @@
 			}
 		},
 		"node_modules/eslint-plugin-no-jquery": {
-			"version": "2.7.0",
-			"resolved": "https://registry.npmjs.org/eslint-plugin-no-jquery/-/eslint-plugin-no-jquery-2.7.0.tgz",
-			"integrity": "sha512-Aeg7dA6GTH1AcWLlBtWNzOU9efK5KpNi7b0EhBO0o0M+awyzguUUo8gF6hXGjQ9n5h8/uRtYv9zOqQkeC5CG0w==",
+			"version": "3.0.2",
+			"resolved": "https://registry.npmjs.org/eslint-plugin-no-jquery/-/eslint-plugin-no-jquery-3.0.2.tgz",
+			"integrity": "sha512-n/+6p6PFhWDNPVLJj1463hw4OTIRBbROGcbhmtOHTgw7yihSKzkwZiQ00EJTneyeR3jRiw5lpWSMCCBhtb8t2g==",
 			"dev": true,
 			"peerDependencies": {
-				"eslint": ">=2.3.0"
+				"eslint": ">=8.0.0"
 			}
 		},
 		"node_modules/eslint-plugin-qunit": {
@@ -2660,9 +2660,9 @@
 			}
 		},
 		"node_modules/grunt-stylelint": {
-			"version": "0.20.0",
-			"resolved": "https://registry.npmjs.org/grunt-stylelint/-/grunt-stylelint-0.20.0.tgz",
-			"integrity": "sha512-TG17gIrP2//lNq5G0YOXFC55WjXOI5Ybib3XVlatEuZcATlo/FO7cfVMgAAxbO2k6f45LP/naS/3iJTod0dVjg==",
+			"version": "0.20.1",
+			"resolved": "https://registry.npmjs.org/grunt-stylelint/-/grunt-stylelint-0.20.1.tgz",
+			"integrity": "sha512-tDep9ceEerB+fK6CkzPBXu5qPM7RuwCRgfrtwugEyYYnxINreMZktqQU5eoTW+MhhFj81uWQQnxf+c4geyAmQg==",
 			"dev": true,
 			"dependencies": {
 				"chalk": "^4.1.2"
@@ -4516,9 +4516,9 @@
 			}
 		},
 		"node_modules/stylelint-config-wikimedia": {
-			"version": "0.17.1",
-			"resolved": "https://registry.npmjs.org/stylelint-config-wikimedia/-/stylelint-config-wikimedia-0.17.1.tgz",
-			"integrity": "sha512-wLgadkHgAkz9jLLOVjBETSU+P3fzHB+rbx4ajct6+w/sqtKd2N9DM77ufJXZXA+Ai0HHanU9ltAy9XzFEFkT2Q==",
+			"version": "0.17.2",
+			"resolved": "https://registry.npmjs.org/stylelint-config-wikimedia/-/stylelint-config-wikimedia-0.17.2.tgz",
+			"integrity": "sha512-cc3PYhe1O/GTgsMOp+Ri3ru579YBbZ3Me0oU7xNb06n4iwyXYPz8qO5G4iQ13UH19UW2NIS8Tk0goPRrJ1RAfw==",
 			"dev": true,
 			"dependencies": {
 				"@stylistic/stylelint-config": "1.0.1",
@@ -6356,9 +6356,9 @@
 			}
 		},
 		"eslint-config-wikimedia": {
-			"version": "0.28.0",
-			"resolved": "https://registry.npmjs.org/eslint-config-wikimedia/-/eslint-config-wikimedia-0.28.0.tgz",
-			"integrity": "sha512-qDkELhXoDvQP+kYYo5MilhvqJ4Agk78Pzu95K1l1h68xPEWagD4k/dvrgmVyKjcp5KyAnZr++7qChLiFhDdBDA==",
+			"version": "0.28.2",
+			"resolved": "https://registry.npmjs.org/eslint-config-wikimedia/-/eslint-config-wikimedia-0.28.2.tgz",
+			"integrity": "sha512-5+rdnT7wH1gpKAO6tHYThg78eMhZMruJzvqku3Y5iaEY/A7kSKLFpA/vOj/snys9fKjDHC9BXmArQh+agkOoJQ==",
 			"dev": true,
 			"requires": {
 				"browserslist-config-wikimedia": "^0.7.0",
@@ -6371,7 +6371,7 @@
 				"eslint-plugin-mediawiki": "^0.7.0",
 				"eslint-plugin-mocha": "^10.4.3",
 				"eslint-plugin-n": "^17.7.0",
-				"eslint-plugin-no-jquery": "^2.7.0",
+				"eslint-plugin-no-jquery": "^3.0.1",
 				"eslint-plugin-qunit": "^8.1.1",
 				"eslint-plugin-security": "^1.7.1",
 				"eslint-plugin-unicorn": "^53.0.0",
@@ -6506,9 +6506,9 @@
 			}
 		},
 		"eslint-plugin-no-jquery": {
-			"version": "2.7.0",
-			"resolved": "https://registry.npmjs.org/eslint-plugin-no-jquery/-/eslint-plugin-no-jquery-2.7.0.tgz",
-			"integrity": "sha512-Aeg7dA6GTH1AcWLlBtWNzOU9efK5KpNi7b0EhBO0o0M+awyzguUUo8gF6hXGjQ9n5h8/uRtYv9zOqQkeC5CG0w==",
+			"version": "3.0.2",
+			"resolved": "https://registry.npmjs.org/eslint-plugin-no-jquery/-/eslint-plugin-no-jquery-3.0.2.tgz",
+			"integrity": "sha512-n/+6p6PFhWDNPVLJj1463hw4OTIRBbROGcbhmtOHTgw7yihSKzkwZiQ00EJTneyeR3jRiw5lpWSMCCBhtb8t2g==",
 			"dev": true,
 			"requires": {}
 		},
@@ -7147,9 +7147,9 @@
 			}
 		},
 		"grunt-stylelint": {
-			"version": "0.20.0",
-			"resolved": "https://registry.npmjs.org/grunt-stylelint/-/grunt-stylelint-0.20.0.tgz",
-			"integrity": "sha512-TG17gIrP2//lNq5G0YOXFC55WjXOI5Ybib3XVlatEuZcATlo/FO7cfVMgAAxbO2k6f45LP/naS/3iJTod0dVjg==",
+			"version": "0.20.1",
+			"resolved": "https://registry.npmjs.org/grunt-stylelint/-/grunt-stylelint-0.20.1.tgz",
+			"integrity": "sha512-tDep9ceEerB+fK6CkzPBXu5qPM7RuwCRgfrtwugEyYYnxINreMZktqQU5eoTW+MhhFj81uWQQnxf+c4geyAmQg==",
 			"dev": true,
 			"requires": {
 				"chalk": "^4.1.2"
@@ -8558,9 +8558,9 @@
 			"requires": {}
 		},
 		"stylelint-config-wikimedia": {
-			"version": "0.17.1",
-			"resolved": "https://registry.npmjs.org/stylelint-config-wikimedia/-/stylelint-config-wikimedia-0.17.1.tgz",
-			"integrity": "sha512-wLgadkHgAkz9jLLOVjBETSU+P3fzHB+rbx4ajct6+w/sqtKd2N9DM77ufJXZXA+Ai0HHanU9ltAy9XzFEFkT2Q==",
+			"version": "0.17.2",
+			"resolved": "https://registry.npmjs.org/stylelint-config-wikimedia/-/stylelint-config-wikimedia-0.17.2.tgz",
+			"integrity": "sha512-cc3PYhe1O/GTgsMOp+Ri3ru579YBbZ3Me0oU7xNb06n4iwyXYPz8qO5G4iQ13UH19UW2NIS8Tk0goPRrJ1RAfw==",
 			"dev": true,
 			"requires": {
 				"@stylistic/stylelint-config": "1.0.1",
diff --git a/package.json b/package.json
index df9dc18d..34ebdfe1 100644
--- a/package.json
+++ b/package.json
@@ -8,14 +8,14 @@
 	},
 	"devDependencies": {
 		"@wikimedia/codex-design-tokens": "1.7.0",
-		"eslint-config-wikimedia": "0.28.0",
+		"eslint-config-wikimedia": "0.28.2",
 		"grunt": "1.6.1",
 		"grunt-banana-checker": "0.13.0",
 		"grunt-eslint": "24.3.0",
-		"grunt-stylelint": "0.20.0",
+		"grunt-stylelint": "0.20.1",
 		"postcss-less": "6.0.0",
 		"sfnt2woff": "^1.0.1",
-		"stylelint-config-wikimedia": "0.17.1",
+		"stylelint-config-wikimedia": "0.17.2",
 		"svgo": "3.2.0"
 	},
 	"eslintIgnore": [
diff --git a/resources/js/.eslintrc.json b/resources/js/.eslintrc.json
index c4ceb723..ead395a9 100644
--- a/resources/js/.eslintrc.json
+++ b/resources/js/.eslintrc.json
@@ -7,6 +7,7 @@
 	],
 	"rules": {
 		"no-jquery/no-global-selector": "off",
-		"no-jquery/no-extend": "warn"
+		"no-jquery/no-extend": "warn",
+		"es-x/no-object-assign": "warn"
 	}
 }
diff --git a/resources/js/ext.uls.displaysettings.js b/resources/js/ext.uls.displaysettings.js
index 9132f388..bfdd8e16 100644
--- a/resources/js/ext.uls.displaysettings.js
+++ b/resources/js/ext.uls.displaysettings.js
@@ -724,7 +724,7 @@
 	};
 
 	// Register this module to language settings modules
-	$.fn.languagesettings.modules = $.extend( $.fn.languagesettings.modules, {
+	$.fn.languagesettings.modules = Object.assign( $.fn.languagesettings.modules, {
 		display: DisplaySettings
 	} );
 }() );
diff --git a/resources/js/ext.uls.ime.js b/resources/js/ext.uls.ime.js
index 80187139..3a5424ff 100644
--- a/resources/js/ext.uls.ime.js
+++ b/resources/js/ext.uls.ime.js
@@ -215,9 +215,9 @@
 			return;
 		}
 		// Extend the ime preference system
-		$.extend( $.ime.preferences, ulsIMEPreferences );
+		Object.assign( $.ime.preferences, ulsIMEPreferences );
 		// MediaWiki specific overrides for jquery.ime
-		$.extend( $.ime.defaults, {
+		Object.assign( $.ime.defaults, {
 			imePath: mwImeRulesPath
 		} );
 
diff --git a/resources/js/ext.uls.inputsettings.js b/resources/js/ext.uls.inputsettings.js
index 285661bf..32c2478f 100644
--- a/resources/js/ext.uls.inputsettings.js
+++ b/resources/js/ext.uls.inputsettings.js
@@ -590,7 +590,7 @@
 	};
 
 	// Register this module to language settings modules
-	$.fn.languagesettings.modules = $.extend( $.fn.languagesettings.modules, {
+	$.fn.languagesettings.modules = Object.assign( $.fn.languagesettings.modules, {
 		input: InputSettings
 	} );
 
diff --git a/resources/js/ext.uls.languagesettings.js b/resources/js/ext.uls.languagesettings.js
index b780f38f..887c55d9 100644
--- a/resources/js/ext.uls.languagesettings.js
+++ b/resources/js/ext.uls.languagesettings.js
@@ -52,7 +52,7 @@
 
 	function LanguageSettings( element, options ) {
 		this.$element = $( element );
-		this.options = $.extend( {}, $.fn.languagesettings.defaults, options );
+		this.options = Object.assign( {}, $.fn.languagesettings.defaults, options );
 		this.$window = $( this.options.template );
 		this.shown = false;
 		this.initialized = false;
diff --git a/resources/js/ext.uls.mediawiki.js b/resources/js/ext.uls.mediawiki.js
index baae3e5a..cea5d3f3 100644
--- a/resources/js/ext.uls.mediawiki.js
+++ b/resources/js/ext.uls.mediawiki.js
@@ -21,7 +21,7 @@
 	'use strict';
 
 	// MediaWiki overrides for ULS defaults
-	$.fn.uls.defaults = $.extend( $.fn.uls.defaults, {
+	$.fn.uls.defaults = Object.assign( $.fn.uls.defaults, {
 		languages: mw.config.get( 'wgULSLanguages' ) || {},
 		searchAPI: mw.util.wikiScript( 'api' ) + '?action=languagesearch&format=json&formatversion=2'
 	} );
diff --git a/resources/js/ext.uls.webfonts.js b/resources/js/ext.uls.webfonts.js
index e2d61624..6e3e283b 100644
--- a/resources/js/ext.uls.webfonts.js
+++ b/resources/js/ext.uls.webfonts.js
@@ -58,7 +58,7 @@
 		},
 
 		load: function () {
-			mw.webfonts.preferences.registry = $.extend( this.registry,
+			mw.webfonts.preferences.registry = Object.assign( this.registry,
 				ulsPreferences.get( 'webfonts' ) );
 		}
 	};
@@ -70,7 +70,7 @@
 		mediawikiFontRepository.base = mw.config.get( 'wgULSFontRepositoryBasePath' );
 
 		// MediaWiki specific overrides for jquery.webfonts
-		$.extend( $.fn.webfonts.defaults, {
+		Object.assign( $.fn.webfonts.defaults, {
 			repository: mediawikiFontRepository,
 			fontStack: $( document.body ).css( 'font-family' ).split( /, /g ),
 			/**