diff --git a/.emacs.d/init.el b/.emacs.d/init.el
index 781c3c8..90885cf 100644
--- a/.emacs.d/init.el
+++ b/.emacs.d/init.el
@@ -242,6 +242,9 @@
         c-basic-offset 4)
   (c-set-offset `inline-open 0))
 
+(use-package antlr-mode
+  :mode "\\.g4\\'")
+
 ;;;; external packages (required)
 (use-package company :ensure
   :config