diff --git a/iris-core/pom.xml b/iris-core/pom.xml
old mode 100755
new mode 100644
index 0daf33c..560baba
--- a/iris-core/pom.xml
+++ b/iris-core/pom.xml
@@ -36,7 +36,7 @@
 		<dependency>
 			<groupId>org.apache.lucene</groupId>
 			<artifactId>lucene-core</artifactId>
-			<version>4.10.2</version>
+			<version>7.1.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.lucene</groupId>