diff --git a/package.json b/package.json
index 47c647c..98e7c36 100644
--- a/package.json
+++ b/package.json
@@ -82,7 +82,7 @@
     "@types/node": "^20.19.0",
     "c8": "^11.0.0",
     "dedent": "^1.5.3",
-    "eslint": "^10.0.0",
+    "eslint": "^10.4.0",
     "eslint-config-eslint": "^14.0.0",
     "eslint-plugin-eslint-plugin": "^7.3.2",
     "globals": "^17.0.0",
diff --git a/src/index.js b/src/index.js
index c9b7310..6994fa3 100644
--- a/src/index.js
+++ b/src/index.js
@@ -19,6 +19,7 @@ import rules from "./build/rules.js";
 const plugin = {
 	meta: {
 		name: "@eslint/json",
+		namespace: "json",
 		version: "1.2.0", // x-release-please-version
 	},
 	languages: {
diff --git a/src/rules/no-duplicate-keys.js b/src/rules/no-duplicate-keys.js
index 611453a..decdb22 100644
--- a/src/rules/no-duplicate-keys.js
+++ b/src/rules/no-duplicate-keys.js
@@ -28,10 +28,12 @@ import { getKey, getRawKey } from "../util.js";
 const rule = {
 	meta: {
 		type: "problem",
+		languages: ["json/json", "json/jsonc", "json/json5"],
 
 		docs: {
 			recommended: true,
 			description: "Disallow duplicate keys in JSON objects",
+			dialects: ["JSON", "JSONC", "JSON5"],
 			url: "https://github.com/eslint/json/tree/main/docs/rules/no-duplicate-keys.md",
 		},
 
diff --git a/src/rules/no-empty-keys.js b/src/rules/no-empty-keys.js
index 4f6e3d0..7125076 100644
--- a/src/rules/no-empty-keys.js
+++ b/src/rules/no-empty-keys.js
@@ -27,10 +27,12 @@ import { getKey } from "../util.js";
 const rule = {
 	meta: {
 		type: "problem",
+		languages: ["json/json", "json/jsonc", "json/json5"],
 
 		docs: {
 			recommended: true,
 			description: "Disallow empty keys in JSON objects",
+			dialects: ["JSON", "JSONC", "JSON5"],
 			url: "https://github.com/eslint/json/tree/main/docs/rules/no-empty-keys.md",
 		},
 
diff --git a/src/rules/no-unnormalized-keys.js b/src/rules/no-unnormalized-keys.js
index e7b366c..44b50a0 100644
--- a/src/rules/no-unnormalized-keys.js
+++ b/src/rules/no-unnormalized-keys.js
@@ -28,12 +28,14 @@ import { getKey, getRawKey } from "../util.js";
 const rule = {
 	meta: {
 		type: "problem",
+		languages: ["json/json", "json/jsonc", "json/json5"],
 
 		fixable: "code",
 
 		docs: {
 			recommended: true,
 			description: "Disallow JSON keys that are not normalized",
+			dialects: ["JSON", "JSONC", "JSON5"],
 			url: "https://github.com/eslint/json/tree/main/docs/rules/no-unnormalized-keys.md",
 		},
 
diff --git a/src/rules/no-unsafe-values.js b/src/rules/no-unsafe-values.js
index ee9b6f5..ee5d3c2 100644
--- a/src/rules/no-unsafe-values.js
+++ b/src/rules/no-unsafe-values.js
@@ -39,10 +39,12 @@ const NON_ZERO = /[1-9]/u;
 const rule = {
 	meta: {
 		type: "problem",
+		languages: ["json/json", "json/jsonc", "json/json5"],
 
 		docs: {
 			recommended: true,
 			description: "Disallow JSON values that are unsafe for interchange",
+			dialects: ["JSON", "JSONC", "JSON5"],
 			url: "https://github.com/eslint/json/tree/main/docs/rules/no-unsafe-values.md",
 		},
 
diff --git a/src/rules/sort-keys.js b/src/rules/sort-keys.js
index b6add2d..0359183 100644
--- a/src/rules/sort-keys.js
+++ b/src/rules/sort-keys.js
@@ -79,6 +79,7 @@ const comparators = {
 const rule = {
 	meta: {
 		type: "suggestion",
+		languages: ["json/json", "json/jsonc", "json/json5"],
 
 		fixable: "code",
 
@@ -95,6 +96,7 @@ const rule = {
 		docs: {
 			recommended: false,
 			description: `Require JSON object keys to be sorted`,
+			dialects: ["JSON", "JSONC", "JSON5"],
 			url: "https://github.com/eslint/json/tree/main/docs/rules/sort-keys.md",
 		},
 
diff --git a/src/rules/top-level-interop.js b/src/rules/top-level-interop.js
index d203892..b519669 100644
--- a/src/rules/top-level-interop.js
+++ b/src/rules/top-level-interop.js
@@ -21,11 +21,13 @@
 const rule = {
 	meta: {
 		type: "problem",
+		languages: ["json/json", "json/jsonc", "json/json5"],
 
 		docs: {
 			recommended: false,
 			description:
 				"Require the JSON top-level value to be an array or object",
+			dialects: ["JSON", "JSONC", "JSON5"],
 			url: "https://github.com/eslint/json/tree/main/docs/rules/top-level-interop.md",
 		},
 
diff --git a/tests/plugin/eslint.test.js b/tests/plugin/eslint.test.js
index f186c96..feba76c 100644
--- a/tests/plugin/eslint.test.js
+++ b/tests/plugin/eslint.test.js
@@ -44,6 +44,42 @@ describe("when the plugin is used with ESLint", () => {
 				.map(([name]) => `json/${name}`);
 			assert.deepStrictEqual(actualRuleIds, expectedRuleIds);
 		});
+
+		it("rules should work when the plugin is registered under a custom namespace", async () => {
+			for (const language of ["json", "jsonc", "json5"]) {
+				const eslint = new ESLint({
+					overrideConfigFile: true,
+					overrideConfig: {
+						files: [`**/*.${language}`],
+						plugins: {
+							eslintjson: json,
+						},
+						language: `eslintjson/${language}`,
+						rules: {
+							"eslintjson/no-duplicate-keys": "error",
+						},
+					},
+				});
+
+				const results = await eslint.lintText(
+					'{"foo": 42, "foo": 43}',
+					{
+						filePath: `test.${language}`,
+					},
+				);
+
+				assert.strictEqual(results.length, 1);
+				assert.strictEqual(results[0].messages.length, 1);
+				assert.strictEqual(
+					results[0].messages[0].ruleId,
+					"eslintjson/no-duplicate-keys",
+				);
+				assert.strictEqual(
+					results[0].messages[0].messageId,
+					"duplicateKey",
+				);
+			}
+		});
 	});
 
 	describe("config comments", () => {
diff --git a/tests/types/types.test.ts b/tests/types/types.test.ts
index c21577a..4bee9d7 100644
--- a/tests/types/types.test.ts
+++ b/tests/types/types.test.ts
@@ -25,6 +25,7 @@ import type { Plugin, SourceLocation, SourceRange } from "@eslint/core";
 
 json satisfies Plugin;
 json.meta.name satisfies string;
+json.meta.namespace satisfies string;
 json.meta.version satisfies string;
 
 // Check that these languages are defined: