diff --git a/.gitignore b/.gitignore
index a1c2a23..a530464 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,23 +1,21 @@
-# Compiled class file
 *.class
 
-# Log file
-*.log
-
-# BlueJ files
-*.ctxt
-
 # Mobile Tools for Java (J2ME)
 .mtj.tmp/
 
 # Package Files #
 *.jar
 *.war
-*.nar
 *.ear
-*.zip
-*.tar.gz
-*.rar
+
+# exclude jar for gradle wrapper
+!gradle/wrapper/*.jar
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+# build files
+**/target
+target
+.gradle
+build