diff --git a/gems/bess/.gitignore b/gems/bess/.gitignore
index 6611418c..35882ed9 100644
--- a/gems/bess/.gitignore
+++ b/gems/bess/.gitignore
@@ -4,3 +4,5 @@
 /pkg/
 /tmp/
 .byebug_history
+
+Gemfile.lock
\ No newline at end of file