diff --git a/extensions/groovy/package.json b/extensions/groovy/package.json
index b3189b3497a..af349857c06 100644
--- a/extensions/groovy/package.json
+++ b/extensions/groovy/package.json
@@ -8,6 +8,7 @@
 			"id": "groovy",
 			"aliases": ["Groovy", "groovy"],
 			"extensions": [".groovy", ".gvy", ".gradle"],
+			"firstLine": "^#!.*\\bgroovy\\b",
 			"configuration": "./language-configuration.json"
 		}],
 		"grammars": [{
@@ -20,4 +21,4 @@
 			"path": "./snippets/groovy.json"
 		}]
 	}
-}
\ No newline at end of file
+}