.gitignore in image_optim-0.24.2 vs .gitignore in image_optim-0.24.3

@@ -5,10 +5,10 @@
 /rdoc/
 /.yardoc/
 /coverage/
 /vendor/
 
-Gemfile.lock
+/Gemfile.lock
 Makefile
 *.o
 *.bundle
 /tmp/
 /.vagrant/