diff --git a/html/lib.html b/html/lib.html
index 7f9899d63958984c7125981ed9160eeb14e9f798..aa7001915b831a1ecaa04beb0a20a217147b8d67 100644
--- a/html/lib.html
+++ b/html/lib.html
@@ -53,7 +53,7 @@ This is a simplified view: <a href="img/dependencies.png">click here for the ful
 <dl>
 <dt><a href="http://ontosim.gforge.inria.fr">OntoSim</a> 2.4: ontosim.jar [<a href="http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html">LGPL</a>]</dt>
 <dd>The whole ontosim system requires more libraries, including JWNL. But in our simplest behaviour, these libraries are not needed.</dd>
-<dt><a href="http://lucene.apache.org/">Lucene</a> 5.3.1: lucene-core.jar, lucene-analyzers-common.jar [<a href="http://www.apache.org/licenses/LICENSE-2.0.html">Apache</a>]</dt>
+<dt><a href="http://lucene.apache.org/">Lucene</a> 6.6.0: lucene-core.jar, lucene-analyzers-common.jar [<a href="http://www.apache.org/licenses/LICENSE-2.0.html">Apache</a>]</dt>
 <dd>This small part of lucene is used for WordNet matching classes.</dd>
 </dl>
 
diff --git a/html/relnotes.html b/html/relnotes.html
index 4d278cc8f797796a35af807156884f50582a9f3c..4173dbe59c98e3d633113cabbb3e22d8bbe78150 100644
--- a/html/relnotes.html
+++ b/html/relnotes.html
@@ -91,6 +91,7 @@ with a warning:
 <li>Upgraded to <span style="color: green">postgres jdbc 42.1.1</span> (lib)</li>
 <li>Upgraded to <span style="color: green">Commons lang 3.6</span> (lib)</li>
 <li>Upgraded to <span style="color: green">Commons text 1.1</span> (lib)</li>
+<li>Upgraded to <span style="color: green">Lucene 6.6.0</span> (lib)</li>
 <li>Upgraded to <span style="color: green">TestNG 6.11</span> (dev)</li>
 </ul></p>
 
diff --git a/lib/lucene/lucene-analyzers-common.jar b/lib/lucene/lucene-analyzers-common.jar
index a8713840cca091fc21a54f75dad8260ed2d810bd..3695b07809fa39df8b227461d38818b47f2da18d 100644
Binary files a/lib/lucene/lucene-analyzers-common.jar and b/lib/lucene/lucene-analyzers-common.jar differ
diff --git a/lib/lucene/lucene-analyzers-common.pom b/lib/lucene/lucene-analyzers-common.pom
index ab2766d0cada758fe32e22e8dc3934e35d60e416..fddbf6a6d7f1e680c39f72b0cc99d7458d390ea9 100644
--- a/lib/lucene/lucene-analyzers-common.pom
+++ b/lib/lucene/lucene-analyzers-common.pom
@@ -3,7 +3,7 @@
 
   <groupId>org.apache.lucene</groupId>
   <artifactId>lucene-analyzers-common</artifactId>
-  <version>5.3.1</version>
+  <version>6.6.0</version>
   <name>Lucene analyzers common</name>
   <description>Apache Lucene standard analysers</description>
   <packaging>jar</packaging>
diff --git a/lib/lucene/lucene-core.jar b/lib/lucene/lucene-core.jar
index 9ffa9173b103500ffe1d28321d08ddb5a8ed6df8..d9d533c9ff45b105a8e48860a008f91a434dc622 100644
Binary files a/lib/lucene/lucene-core.jar and b/lib/lucene/lucene-core.jar differ
diff --git a/lib/lucene/lucene-core.pom b/lib/lucene/lucene-core.pom
index 08a6cc6496a93c7f4a65f0b5783d9c8ab7645c89..ea11e18525af6b463e29b8dcf63a3787a00f43a9 100644
--- a/lib/lucene/lucene-core.pom
+++ b/lib/lucene/lucene-core.pom
@@ -3,7 +3,7 @@
 
   <groupId>org.apache.lucene</groupId>
   <artifactId>lucene-core</artifactId>
-  <version>5.3.1</version>
+  <version>6.6.0</version>
   <name>Lucene Core</name>
   <description>Apache Lucene Java Core</description>
   <packaging>jar</packaging>