diff --git a/package.json b/package.json
index a4322909..46fb0ec3 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,12 @@
   ],
   "icon": "images/icon.png",
   "activationEvents": [
-    "onStartupFinished"
+    "onLanguage:verilog",
+    "onLanguage:systemverilog",
+    "onLanguage:bsv",
+    "onLanguage:ucf",
+    "onLanguage:sdc",
+    "onLanguage:xdc"
   ],
   "main": "./out/src/extension",
   "contributes": {