diff --git a/.eslintrc.json b/.eslintrc.json
index c498c3d2a..96060c6b9 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,7 +1,7 @@
 {
 	"root": true,
 	"extends": [
-		"wikimedia/client",
+		"wikimedia/client-es5",
 		"wikimedia/jquery",
 		"wikimedia/mediawiki"
 	]
diff --git a/package-lock.json b/package-lock.json
index aa14b5c31..f7b3b3a9e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1312,9 +1312,9 @@
 			"dev": true
 		},
 		"eslint": {
-			"version": "7.21.0",
-			"resolved": "https://registry.npmjs.org/eslint/-/eslint-7.21.0.tgz",
-			"integrity": "sha512-W2aJbXpMNofUp0ztQaF40fveSsJBjlSCSWpy//gzfTvwC+USs/nceBrKmlJOiM8r1bLwP2EuYkCqArn/6QTIgg==",
+			"version": "7.22.0",
+			"resolved": "https://registry.npmjs.org/eslint/-/eslint-7.22.0.tgz",
+			"integrity": "sha512-3VawOtjSJUQiiqac8MQc+w457iGLfuNGLFn8JmF051tTKbh5/x/0vlcEj8OgDCaw7Ysa2Jn8paGshV7x2abKXg==",
 			"dev": true,
 			"requires": {
 				"@babel/code-frame": "7.12.11",
@@ -1334,7 +1334,7 @@
 				"file-entry-cache": "^6.0.1",
 				"functional-red-black-tree": "^1.0.1",
 				"glob-parent": "^5.0.0",
-				"globals": "^12.1.0",
+				"globals": "^13.6.0",
 				"ignore": "^4.0.6",
 				"import-fresh": "^3.0.0",
 				"imurmurhash": "^0.1.4",
@@ -1342,7 +1342,7 @@
 				"js-yaml": "^3.13.1",
 				"json-stable-stringify-without-jsonify": "^1.0.1",
 				"levn": "^0.4.1",
-				"lodash": "^4.17.20",
+				"lodash": "^4.17.21",
 				"minimatch": "^3.0.4",
 				"natural-compare": "^1.4.0",
 				"optionator": "^0.9.1",
@@ -1372,9 +1372,9 @@
 					"dev": true
 				},
 				"@babel/highlight": {
-					"version": "7.13.8",
-					"resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.13.8.tgz",
-					"integrity": "sha512-4vrIhfJyfNf+lCtXC2ck1rKSzDwciqF7IWFhXXrSOUC2O5DrVp+w4c6ed4AllTxhTkUP5x2tYj41VaxdVMMRDw==",
+					"version": "7.13.10",
+					"resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.13.10.tgz",
+					"integrity": "sha512-5aPpe5XQPzflQrFwL1/QoeHkP2MsA4JCntcXHRhEsdsfPVkvPi2w7Qix4iV7t5S/oC9OodGrggd8aco1g3SZFg==",
 					"dev": true,
 					"requires": {
 						"@babel/helper-validator-identifier": "^7.12.11",
@@ -1447,12 +1447,12 @@
 					"dev": true
 				},
 				"globals": {
-					"version": "12.4.0",
-					"resolved": "https://registry.npmjs.org/globals/-/globals-12.4.0.tgz",
-					"integrity": "sha512-BWICuzzDvDoH54NHKCseDanAhE3CeDorgDL5MT6LMXXj2WCnd9UC2szdk4AWLfjdgNBCXLUanXYcpBBKOSWGwg==",
+					"version": "13.6.0",
+					"resolved": "https://registry.npmjs.org/globals/-/globals-13.6.0.tgz",
+					"integrity": "sha512-YFKCX0SiPg7l5oKYCJ2zZGxcXprVXHcSnVuvzrT3oSENQonVLqM5pf9fN5dLGZGyCjhw8TN8Btwe/jKnZ0pjvQ==",
 					"dev": true,
 					"requires": {
-						"type-fest": "^0.8.1"
+						"type-fest": "^0.20.2"
 					}
 				},
 				"has-flag": {
@@ -1475,13 +1475,19 @@
 					"requires": {
 						"lru-cache": "^6.0.0"
 					}
+				},
+				"type-fest": {
+					"version": "0.20.2",
+					"resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.20.2.tgz",
+					"integrity": "sha512-Ne+eE4r0/iWnpAxD852z3A+N0Bt5RN//NjJwRd2VFHEmrywxf5vsZlh4R6lixl6B+wz/8d+maTSAkN1FIkI3LQ==",
+					"dev": true
 				}
 			}
 		},
 		"eslint-config-wikimedia": {
-			"version": "0.18.2",
-			"resolved": "https://registry.npmjs.org/eslint-config-wikimedia/-/eslint-config-wikimedia-0.18.2.tgz",
-			"integrity": "sha512-OllUgce2qODU/6481jg/a1kT/dygBDY1xhxXuAiQdYxJARV6LXyuiJw+wl1QBQz+huV9NXRxoJGC3L6x/NzC4g==",
+			"version": "0.19.0",
+			"resolved": "https://registry.npmjs.org/eslint-config-wikimedia/-/eslint-config-wikimedia-0.19.0.tgz",
+			"integrity": "sha512-zCa5IFT9lTcyF6w0OTmhPVXwrU+mcASGi74gdzuVOgvO7YVNzQzA+yyGh2Q8vIzvEt+i72/BcsGF5Y8/mOrStw==",
 			"dev": true,
 			"requires": {
 				"eslint": "^7.17.0",
@@ -1515,9 +1521,9 @@
 			},
 			"dependencies": {
 				"caniuse-lite": {
-					"version": "1.0.30001196",
-					"resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001196.tgz",
-					"integrity": "sha512-CPvObjD3ovWrNBaXlAIGWmg2gQQuJ5YhuciUOjPRox6hIQttu8O+b51dx6VIpIY9ESd2d0Vac1RKpICdG4rGUg==",
+					"version": "1.0.30001199",
+					"resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001199.tgz",
+					"integrity": "sha512-ifbK2eChUCFUwGhlEzIoVwzFt1+iriSjyKKFYNfv6hN34483wyWpLLavYQXhnR036LhkdUYaSDpHg1El++VgHQ==",
 					"dev": true
 				},
 				"semver": {
@@ -1662,9 +1668,9 @@
 			}
 		},
 		"eslint-plugin-qunit": {
-			"version": "5.3.0",
-			"resolved": "https://registry.npmjs.org/eslint-plugin-qunit/-/eslint-plugin-qunit-5.3.0.tgz",
-			"integrity": "sha512-SeN55paT/BkFvNmi+CSnoCymisEJbmDYvPoBbVlRGsL3ara0P6fnGYRxjIhF6cK37CTZf/8vD5lrVxS3mb0LzA==",
+			"version": "5.4.0",
+			"resolved": "https://registry.npmjs.org/eslint-plugin-qunit/-/eslint-plugin-qunit-5.4.0.tgz",
+			"integrity": "sha512-vdqMW+YfZOH9AW7U1xc82UwKAdz2xlyuh0Hl+kTXj1E8JPy1B6K+/SBIqRNJUFyuPXHwzKb5Q/kr9i/sU7oMZA==",
 			"dev": true,
 			"requires": {
 				"eslint-utils": "^2.1.0",
@@ -5165,9 +5171,9 @@
 			},
 			"dependencies": {
 				"ajv": {
-					"version": "7.1.1",
-					"resolved": "https://registry.npmjs.org/ajv/-/ajv-7.1.1.tgz",
-					"integrity": "sha512-ga/aqDYnUy/o7vbsRTFhhTsNeXiYb5JWDIcRIeZfwRNCefwjNTVYCGdGSUrEmiu3yDK3vFvNbgJxvrQW4JXrYQ==",
+					"version": "7.2.1",
+					"resolved": "https://registry.npmjs.org/ajv/-/ajv-7.2.1.tgz",
+					"integrity": "sha512-+nu0HDv7kNSOua9apAVc979qd932rrZeb3WOvoiD31A/p1mIE5/9bN2027pE2rOPYEdS3UHzsvof4hY+lM9/WQ==",
 					"dev": true,
 					"requires": {
 						"fast-deep-equal": "^3.1.1",
@@ -5523,21 +5529,6 @@
 						"acorn-jsx": "^5.2.0",
 						"eslint-visitor-keys": "^1.1.0"
 					}
-				},
-				"esquery": {
-					"version": "1.4.0",
-					"resolved": "https://registry.npmjs.org/esquery/-/esquery-1.4.0.tgz",
-					"integrity": "sha512-cCDispWt5vHHtwMY2YrAQ4ibFkAL8RbH5YGBnZBc90MolvvfkkQcJro/aZiAQUlQ3qgrYS6D6v8Gc5G5CQsc9w==",
-					"dev": true,
-					"requires": {
-						"estraverse": "^5.1.0"
-					}
-				},
-				"estraverse": {
-					"version": "5.2.0",
-					"resolved": "https://registry.npmjs.org/estraverse/-/estraverse-5.2.0.tgz",
-					"integrity": "sha512-BxbNGGNm0RyRYvUdHpIwv9IWzeM9XClbOxwoATuFdOE7ZE6wHL+HQ5T8hoPM+zHvmKzzsEqhgy0GrQ5X13afiQ==",
-					"dev": true
 				}
 			}
 		},
diff --git a/package.json b/package.json
index 503c274f4..497c091cf 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
 		"test": "grunt test"
 	},
 	"devDependencies": {
-		"eslint-config-wikimedia": "0.18.2",
+		"eslint-config-wikimedia": "0.19.0",
 		"grunt": "1.3.0",
 		"grunt-banana-checker": "0.9.0",
 		"grunt-eslint": "23.0.0",