diff --git a/.gitignore b/.gitignore
index 3d3b62d8d..3a86f3450 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,5 +12,7 @@ nb-configuration.xml
 /target/
 #maven-shade-plugin generated pom
 dependency-reduced-pom.xml
-# vim files
-*.swp
+#ruby Gemfile, etc. This is a java project, Gemfile is here to check site problem with Jekyll
+Gemfile
+Gemfile.lock
+_site/**
\ No newline at end of file