diff --git a/pom.xml b/pom.xml
index acb7826..817ec6e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -59,7 +59,7 @@
 		<org.imixs.workflow.version>4.3.6</org.imixs.workflow.version>
 		<custom.webResources>src/main/webapp</custom.webResources>
 		<custom.unpackTypes>war</custom.unpackTypes>
-		<lucene.version>7.5.0</lucene.version>
+		<lucene.version>6.6.1</lucene.version>
 	</properties>