diff --git a/CMakeLists.txt b/CMakeLists.txt
index a1ea7635..32da3d13 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -235,6 +235,13 @@ target_include_directories(${LIB_JAVA_PROJECT_NAME} SYSTEM
 
 link_directories(${Boost_LIBRARY_DIRS})
 
+add_custom_command(
+	TARGET ${LIB_JAVA_PROJECT_NAME}
+	PRE_BUILD
+	COMMAND ${PROJECT_SOURCE_DIR}/script/update_java_indexer.sh
+	COMMENT "updating java indexer jars"
+)
+
 
 # Lib Gui ----------------------------------------------------------------------