diff --git a/package.json b/package.json
index 3cf421b..f6214b2 100644
--- a/package.json
+++ b/package.json
@@ -1,60 +1,76 @@
 {
 	"name": "arc-vscode",
 	"displayName": "arc vscode",
 	"description": "Arcanist (Phabricator) support for VSCode",
 	"version": "0.0.1",
 	"engines": {
 		"vscode": "^1.46.0"
 	},
 	"categories": [
 		"Other"
 	],
 	"activationEvents": [
 		"workspaceContains:**/.arclint",
 		"workspaceContains:**/.arcconfig"
 	],
 	"main": "./out/extension.js",
 	"contributes": {
 		"commands": [
 			{
 				"command": "arc-vscode.clearLint",
 				"title": "Clear all arc-lint messages"
 			}
 		],
 		"configuration": {
 			"title": "Arcanist",
 			"properties": {
 				"arc-vscode.lint.maxDiagnosticsLevel": {
 					"type": "string",
 					"default": "error",
-					"enum": ["error", "warning", "info", "hint"],
+					"enum": [
+						"error",
+						"warning",
+						"info",
+						"hint"
+					],
 					"description": "The maximum level a lint can appear at."
 				}
 			}
-		}
+		},
+		"languages": [
+			{
+				"id": "json",
+				"extensions": [
+					".arcconfig",
+					".arclint",
+					".arcrc",
+					".arcunit"
+				]
+			}
+		]
 	},
 	"scripts": {
 		"vscode:prepublish": "npm run compile",
 		"compile": "tsc -p ./",
 		"lint": "eslint src --ext ts",
 		"watch": "tsc -watch -p ./",
 		"pretest": "npm run compile && npm run lint",
 		"test": "node ./out/test/runTest.js"
 	},
 	"devDependencies": {
 		"@types/vscode": "^1.46.0",
 		"@types/glob": "^7.1.1",
 		"@types/mocha": "^7.0.2",
 		"@types/node": "^13.11.0",
 		"eslint": "^6.8.0",
 		"@typescript-eslint/parser": "^2.30.0",
 		"@typescript-eslint/eslint-plugin": "^2.30.0",
 		"glob": "^7.1.6",
 		"mocha": "^7.1.2",
 		"typescript": "^3.8.3",
 		"vscode-test": "^1.3.0"
 	},
 	"dependencies": {
 		"execa": "^4.0.2"
 	}
 }