diff --git a/package.json b/package.json
index 7317512..aa1eae2 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,28 @@
     "onLanguage:markdown"
   ],
   "main": "./out/src/extension",
+  "contributes": {
+    "configuration":{
+      "type": "object",
+      "title": "write-good",
+      "properties": {
+        "write-good.languages": {
+          "default": [
+            "markdown"
+          ],
+          "type": [
+            "string",
+            "array"
+          ],
+          "items": {
+            "type": "string"
+          },
+          "description": "Languages to lint with the write-good linter. '*' to enable on all languages.",
+          "scope": "resource"
+        }
+      }
+    }
+  },
   "scripts": {
     "vscode:prepublish": "node ./node_modules/vscode/bin/compile",
     "compile": "node ./node_modules/vscode/bin/compile -watch -p ./",
diff --git a/src/extension.ts b/src/extension.ts
index bdfd209..79fda0e 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -8,15 +8,28 @@ export function activate(context: ExtensionContext) {
 
     console.log("Write-Good Linter active...");
 
+    function isWriteGoodLanguage(languageId) {
+        let wgLanguages: string = workspace.getConfiguration('write-good').get('languages');
+        return (wgLanguages.indexOf(languageId) > -1 || wgLanguages === '*');
+    }
+    
     context.subscriptions.push(workspace.onDidChangeTextDocument(event => {
-        doLint(event.document);
+        if (isWriteGoodLanguage(event.document.languageId)) {
+            doLint(event.document);
+        }
     }));
 
     context.subscriptions.push(workspace.onDidOpenTextDocument(event => {
-        doLint(event);
+        if (isWriteGoodLanguage(event.languageId)) {
+            doLint(event);
+        }
     }));
 }
 
+export function deactivate() {
+    console.log("Write-Good Linter deactivating...")
+}
+
 interface Suggestion {
     index: number,
     offset: number,