diff --git a/package.json b/package.json
index 8c50fa13..f428bfde 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,8 @@
   },
   "activationEvents": [
     "onLanguage:haskell",
-    "onLanguage:literate haskell"
+    "onLanguage:literate haskell",
+    "onLanguage:cabal"
   ],
   "main": "./dist/extension",
   "contributes": {
@@ -49,6 +50,16 @@
           ".hs"
         ]
       },
+      {
+        "id": "cabal",
+        "aliases": [
+          "Cabal"
+        ],
+        "extensions": [
+          ".cabal"
+        ]
+      },
+
       {
         "id": "literate haskell",
         "aliases": [
diff --git a/src/extension.ts b/src/extension.ts
index ba391c1f..c53816dd 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -259,6 +259,7 @@ async function activateServerForFolder(context: ExtensionContext, uri: Uri, fold
     documentSelector: [
       { scheme: 'file', language: 'haskell', pattern: pat },
       { scheme: 'file', language: 'literate haskell', pattern: pat },
+      { scheme: 'file', language: 'cabal', pattern: pat },
     ],
     synchronize: {
       // Synchronize the setting section 'haskell' to the server.